diff --git a/pkgs/development/tools/build-managers/msbuild/create-deps.sh b/pkgs/development/tools/build-managers/msbuild/create-deps.sh
index de1cc0b268cb..c9bd4ba7eb6a 100755
--- a/pkgs/development/tools/build-managers/msbuild/create-deps.sh
+++ b/pkgs/development/tools/build-managers/msbuild/create-deps.sh
@@ -1,29 +1,54 @@
 #!/usr/bin/env nix-shell
-#!nix-shell -i bash -p msbuild
+#!nix-shell -i bash -p jq -p xmlstarlet -p curl
 set -euo pipefail
 
 cat << EOL
 { fetchurl }: [
 EOL
 
-tmpdir="$(mktemp -d -p "$(pwd)")" # must be under source root
-trap 'rm -rf $tmpdir' EXIT
+mapfile -t repos < <(
+    xmlstarlet sel -t -v 'configuration/packageSources/add/@value' -n NuGet.config |
+        while IFS= read index
+        do
+            curl --compressed -fsL "$index" | \
+                jq -r '.resources[] | select(."@type" == "PackageBaseAddress/3.0.0")."@id"'
+        done
+    )
+
+find .packages fake-home/.nuget/packages -name \*.nupkg -printf '%P\n' | sort -u |
+    while IFS= read file
+    do
+        packagedir=$(dirname $file)
+        version=$(basename $packagedir)
+        package=$(dirname $packagedir)
+
+        found=false
+        for repo in "${repos[@]}"
+        do
+            url="$repo$package/$version/$package.$version.nupkg"
+            if curl -fsL "$url" -o /dev/null
+            then
+                found=true
+                break
+            fi
+        done
+
+        if ! $found
+        then
+            echo "couldn't find $package $version" >&2
+            exit 1
+        fi
 
-(
-    ulimit -n 8192 # https://github.com/NuGet/Home/issues/8571
-    export HOME="$tmpdir"
-    msbuild -noAutoRsp -t:restore -p:RestoreNoCache=true MSBuild.sln
-    msbuild -noAutoRsp -t:restore -p:RestoreNoCache=true "$tmpdir"/.nuget/packages/microsoft.dotnet.arcade.sdk/*/tools/Tools.proj
-) | \
-    sed -nr 's/^ *OK *(.*\.nupkg).*$/\1/p' | \
-    sort -u | \
-    while read url; do
         sha256=$(nix-prefetch-url "$url" 2>/dev/null)
         cat << EOL
-  (fetchurl {
-    url = "$url";
-    sha256 = "$sha256";
-  })
+  {
+    name = "$package";
+    version = "$version";
+    src = fetchurl {
+      url = "$url";
+      sha256 = "$sha256";
+    };
+  }
 EOL
     done
 
diff --git a/pkgs/development/tools/build-managers/msbuild/default.nix b/pkgs/development/tools/build-managers/msbuild/default.nix
index b8d8a9ac7781..2613f2d535e6 100644
--- a/pkgs/development/tools/build-managers/msbuild/default.nix
+++ b/pkgs/development/tools/build-managers/msbuild/default.nix
@@ -1,23 +1,33 @@
-{ lib, stdenv, fetchurl, makeWrapper, glibcLocales, mono, dotnetPackages, unzip, dotnet-sdk }:
+{ lib, stdenv, fetchurl, fetchpatch, makeWrapper, glibcLocales, mono, dotnetPackages, unzip, dotnet-sdk, writeText }:
 
 let
 
   xplat = fetchurl {
-    url = "https://github.com/mono/msbuild/releases/download/0.07/mono_msbuild_xplat-master-8f608e49.zip";
-    sha256 = "1jxq3fk9a6q2a8i9zacxaz3fkvc22i9qvzlpa7wbb95h42g0ffhq";
+    url = "https://github.com/mono/msbuild/releases/download/0.08/mono_msbuild_6.4.0.208.zip";
+    sha256 = "05k7qmnhfvrdgyjn6vp81jb97y21m261jnwdyqpjqpcmzz18j93g";
   };
 
-  deps = import ./nuget.nix { inherit fetchurl; };
+  deps = map (package: package.src)
+    (import ./deps.nix { inherit fetchurl; });
+
+  nuget-config = writeText "NuGet.config" ''
+    <?xml version="1.0" encoding="utf-8"?>
+    <configuration>
+      <packageSources>
+        <clear />
+      </packageSources>
+    </configuration>
+  '';
 
 in
 
 stdenv.mkDerivation rec {
   pname = "msbuild";
-  version = "16.3+xamarinxplat.2019.07.26.14.57";
+  version = "16.8+xamarinxplat.2020.07.30.15.02";
 
   src = fetchurl {
     url = "https://download.mono-project.com/sources/msbuild/msbuild-${version}.tar.xz";
-    sha256 = "1zcdfx4xsh62wj3g1jc2an0lppsfs691lz4dv05xbgi01aq1hk6a";
+    sha256 = "10amyca78b6pjfsy54b1rgwz2c1bx0sfky9zhldvzy4divckp25g";
   };
 
   nativeBuildInputs = [
@@ -37,17 +47,24 @@ stdenv.mkDerivation rec {
   LOCALE_ARCHIVE = lib.optionalString stdenv.isLinux
       "${glibcLocales}/lib/locale/locale-archive";
 
+  patches = [
+    (fetchpatch {
+      url = "https://github.com/mono/msbuild/commit/cad85cefabdaa001fb4bdbea2f5bf1d1cdb83c9b.patch";
+      sha256 = "1s8agc7nxxs69b3fl1v1air0c4dpig3hy4sk11l1560jrlx06dhh";
+    })
+  ];
+
   buildPhase = ''
     # nuget would otherwise try to base itself in /homeless-shelter
     export HOME=$(pwd)/fake-home
 
+    cp ${nuget-config} NuGet.config
+    nuget sources Add -Name nixos -Source $(pwd)/nixos
+
     for package in ${toString deps}; do
       nuget add $package -Source nixos
     done
 
-    nuget sources Disable -Name "nuget.org"
-    nuget sources Add -Name nixos -Source $(pwd)/nixos
-
     # license check is case sensitive
     mv LICENSE license.bak && mv license.bak license
 
@@ -61,19 +78,17 @@ stdenv.mkDerivation rec {
     # overwrite the file
     echo "#!${stdenv.shell}" > eng/common/dotnet-install.sh
 
-    # msbuild response files to use only the nixos source
-    echo "/p:RestoreSources=nixos" > artifacts/mono-msbuild/MSBuild.rsp
-
     # not patchShebangs, there is /bin/bash in the body of the script as well
     substituteInPlace ./eng/cibuild_bootstrapped_msbuild.sh --replace /bin/bash ${stdenv.shell}
 
     # DisableNerdbankVersioning https://gitter.im/Microsoft/msbuild/archives/2018/06/27?at=5b33dbc4ce3b0f268d489bfa
     # TODO there are some (many?) failing tests
     ./eng/cibuild_bootstrapped_msbuild.sh --host_type mono --configuration Release --skip_tests /p:DisableNerdbankVersioning=true
+    patchShebangs stage1/mono-msbuild/msbuild
   '';
 
   installPhase = ''
-    mono artifacts/mono-msbuild/MSBuild.dll mono/build/install.proj /p:MonoInstallPrefix="$out" /p:Configuration=Release-MONO
+    stage1/mono-msbuild/msbuild mono/build/install.proj /p:MonoInstallPrefix="$out" /p:Configuration=Release-MONO
 
     ln -s ${mono}/lib/mono/msbuild/Current/bin/Roslyn $out/lib/mono/msbuild/Current/bin/Roslyn
 
diff --git a/pkgs/development/tools/build-managers/msbuild/deps.nix b/pkgs/development/tools/build-managers/msbuild/deps.nix
new file mode 100644
index 000000000000..32d1c9569a66
--- /dev/null
+++ b/pkgs/development/tools/build-managers/msbuild/deps.nix
@@ -0,0 +1,1562 @@
+{ fetchurl }: [
+  {
+    name = "fsharp.net.sdk";
+    version = "1.0.4-bundled-0100";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/fsharp.net.sdk/1.0.4-bundled-0100/fsharp.net.sdk.1.0.4-bundled-0100.nupkg";
+      sha256 = "0zy4n2an2jh3xrdy1m5fjvynpd0b66i0hkpqdhy2q6d7dj0ks351";
+    };
+  }
+  {
+    name = "illink.tasks";
+    version = "0.1.6-prerelease.19380.1";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/illink.tasks/0.1.6-prerelease.19380.1/illink.tasks.0.1.6-prerelease.19380.1.nupkg";
+      sha256 = "1ihgzhizgiijg2kj38fn6hsinvxi7bvl0dpk7mbgc08rpgfdsvja";
+    };
+  }
+  {
+    name = "largeaddressaware";
+    version = "1.0.3";
+    src = fetchurl {
+      url = "https://api.nuget.org/v3-flatcontainer/largeaddressaware/1.0.3/largeaddressaware.1.0.3.nupkg";
+      sha256 = "1ppss9bgj0hf5s8307bnm2a4qm10mrymp0v12m28a5q81zjz0fr5";
+    };
+  }
+  {
+    name = "microbuild.core";
+    version = "0.2.0";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/microbuild.core/0.2.0/microbuild.core.0.2.0.nupkg";
+      sha256 = "1ya040l8fhi0hhira8kwdmv7cc88ar7kiixkpxirgcn9gmpn7ggv";
+    };
+  }
+  {
+    name = "microbuild.core.sentinel";
+    version = "1.0.0";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/microbuild.core.sentinel/1.0.0/microbuild.core.sentinel.1.0.0.nupkg";
+      sha256 = "035kqx5fkapql108n222lz8psvxk04mv3dy1qg3h08i4b8j3dy8i";
+    };
+  }
+  {
+    name = "microsoft.bcl.asyncinterfaces";
+    version = "1.1.0";
+    src = fetchurl {
+      url = "https://api.nuget.org/v3-flatcontainer/microsoft.bcl.asyncinterfaces/1.1.0/microsoft.bcl.asyncinterfaces.1.1.0.nupkg";
+      sha256 = "1dq5yw7cy6s42193yl4iqscfw5vzkjkgv0zyy32scr4jza6ni1a1";
+    };
+  }
+  {
+    name = "microsoft.build";
+    version = "14.3.0";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/microsoft.build/14.3.0/microsoft.build.14.3.0.nupkg";
+      sha256 = "16jzspb0qj9szjfhhmb836vgqdq4m1gk3y816qg2mdjmv52r91dh";
+    };
+  }
+  {
+    name = "microsoft.build.centralpackageversions";
+    version = "2.0.1";
+    src = fetchurl {
+      url = "https://api.nuget.org/v3-flatcontainer/microsoft.build.centralpackageversions/2.0.1/microsoft.build.centralpackageversions.2.0.1.nupkg";
+      sha256 = "17cjiaj2b98q8s89168g42jb8rhwm6062jcbv57rbkdiiwdsn55k";
+    };
+  }
+  {
+    name = "microsoft.build.framework";
+    version = "14.3.0";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/microsoft.build.framework/14.3.0/microsoft.build.framework.14.3.0.nupkg";
+      sha256 = "19p1w27d3qi09fxag0byvjrv6x54nd5fkiszqzqr7676r90aswxh";
+    };
+  }
+  {
+    name = "microsoft.build.framework";
+    version = "15.5.180";
+    src = fetchurl {
+      url = "https://api.nuget.org/v3-flatcontainer/microsoft.build.framework/15.5.180/microsoft.build.framework.15.5.180.nupkg";
+      sha256 = "064y3a711ikx9pm9d2wyms4i3k4f9hfvn3vymhwygg7yv7gcj92z";
+    };
+  }
+  {
+    name = "microsoft.build.nugetsdkresolver";
+    version = "5.7.0-rtm.6710";
+    src = fetchurl {
+      url = "https://pkgs.dev.azure.com/dnceng/9ee6d478-d288-47f7-aacc-f6e6d082ae6d/_packaging/9d15d80a-6afc-4f7e-901b-9378146a4b8b/nuget/v3/flat2/microsoft.build.nugetsdkresolver/5.7.0-rtm.6710/microsoft.build.nugetsdkresolver.5.7.0-rtm.6710.nupkg";
+      sha256 = "07zi6akd5iqq6q3cwc273vvfx70dn2lzx1ham4pzlq7dh7gq3vha";
+    };
+  }
+  {
+    name = "microsoft.build.tasks.git";
+    version = "1.1.0-beta-20206-02";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/microsoft.build.tasks.git/1.1.0-beta-20206-02/microsoft.build.tasks.git.1.1.0-beta-20206-02.nupkg";
+      sha256 = "1gwlhvqlkvs5c7qjky726alf71xflbh3x970g3dypfczi0y6gccx";
+    };
+  }
+  {
+    name = "microsoft.build.utilities.core";
+    version = "14.3.0";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/microsoft.build.utilities.core/14.3.0/microsoft.build.utilities.core.14.3.0.nupkg";
+      sha256 = "0xk5n4i40w53amrd7bxlhikdvmh8z2anrk99pvz2rf50v946g6li";
+    };
+  }
+  {
+    name = "microsoft.build.utilities.core";
+    version = "15.5.180";
+    src = fetchurl {
+      url = "https://api.nuget.org/v3-flatcontainer/microsoft.build.utilities.core/15.5.180/microsoft.build.utilities.core.15.5.180.nupkg";
+      sha256 = "0c4bjhaqgc98bchln8p5d2p1vyn8qrha2b8gpn2l7bnznbcrd630";
+    };
+  }
+  {
+    name = "microsoft.codeanalysis.build.tasks";
+    version = "3.0.0-beta3-19064-03";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/microsoft.codeanalysis.build.tasks/3.0.0-beta3-19064-03/microsoft.codeanalysis.build.tasks.3.0.0-beta3-19064-03.nupkg";
+      sha256 = "1l01l0jyqgs8ix5v6b6n0q4yv1y1khr14dh7pw0qivkc5gsys19v";
+    };
+  }
+  {
+    name = "microsoft.codecoverage";
+    version = "16.1.1";
+    src = fetchurl {
+      url = "https://api.nuget.org/v3-flatcontainer/microsoft.codecoverage/16.1.1/microsoft.codecoverage.16.1.1.nupkg";
+      sha256 = "0xca3sys0a5ilz16ic7g4gds2b974nvmf89qwr1i6v8f7illhda5";
+    };
+  }
+  {
+    name = "microsoft.diasymreader.pdb2pdb";
+    version = "1.1.0-beta2-19521-03";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/microsoft.diasymreader.pdb2pdb/1.1.0-beta2-19521-03/microsoft.diasymreader.pdb2pdb.1.1.0-beta2-19521-03.nupkg";
+      sha256 = "1r82h0qiah2xx9rg8lvfvfdzxz60zd6vfs8kvck0csha5psmn56w";
+    };
+  }
+  {
+    name = "microsoft.dotnet.arcade.sdk";
+    version = "1.0.0-beta.20365.6";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/microsoft.dotnet.arcade.sdk/1.0.0-beta.20365.6/microsoft.dotnet.arcade.sdk.1.0.0-beta.20365.6.nupkg";
+      sha256 = "1ypsxq3ljdfwvrqyg6b8ii8mbqnjcb2vdr17jc4h0mdmkj0rlcdl";
+    };
+  }
+  {
+    name = "microsoft.dotnet.msbuildsdkresolver";
+    version = "3.1.400-preview.20365.4";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/microsoft.dotnet.msbuildsdkresolver/3.1.400-preview.20365.4/microsoft.dotnet.msbuildsdkresolver.3.1.400-preview.20365.4.nupkg";
+      sha256 = "0ifhk0whgbq0yw075al8sb14ajcnvyp883srx1j62vil9gfz0fp9";
+    };
+  }
+  {
+    name = "microsoft.dotnet.signtool";
+    version = "1.0.0-beta.20365.6";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/microsoft.dotnet.signtool/1.0.0-beta.20365.6/microsoft.dotnet.signtool.1.0.0-beta.20365.6.nupkg";
+      sha256 = "0zaw9hc19ldms3jy6n27x4p9clzz3nvpddyacwhgqiahjw2wqasz";
+    };
+  }
+  {
+    name = "microsoft.net.build.extensions";
+    version = "3.1.400-preview.20365.20";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/microsoft.net.build.extensions/3.1.400-preview.20365.20/microsoft.net.build.extensions.3.1.400-preview.20365.20.nupkg";
+      sha256 = "1vmcj7p7jsr1lbkbxqqjsixkaxdazr5nwhhp1q402dgky9cayhd5";
+    };
+  }
+  {
+    name = "microsoft.net.compilers.toolset";
+    version = "3.7.0-5.20367.1";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/microsoft.net.compilers.toolset/3.7.0-5.20367.1/microsoft.net.compilers.toolset.3.7.0-5.20367.1.nupkg";
+      sha256 = "1z8hzzmxs8jchq1jmmmwhpf3hsvrj803y3zb8j3xg9xkbnryfzwk";
+    };
+  }
+  {
+    name = "microsoft.netcore.platforms";
+    version = "1.0.1";
+    src = fetchurl {
+      url = "https://api.nuget.org/v3-flatcontainer/microsoft.netcore.platforms/1.0.1/microsoft.netcore.platforms.1.0.1.nupkg";
+      sha256 = "01al6cfxp68dscl15z7rxfw9zvhm64dncsw09a1vmdkacsa2v6lr";
+    };
+  }
+  {
+    name = "microsoft.netcore.platforms";
+    version = "1.1.0";
+    src = fetchurl {
+      url = "https://api.nuget.org/v3-flatcontainer/microsoft.netcore.platforms/1.1.0/microsoft.netcore.platforms.1.1.0.nupkg";
+      sha256 = "08vh1r12g6ykjygq5d3vq09zylgb84l63k49jc4v8faw9g93iqqm";
+    };
+  }
+  {
+    name = "microsoft.netcore.targets";
+    version = "1.0.1";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/microsoft.netcore.targets/1.0.1/microsoft.netcore.targets.1.0.1.nupkg";
+      sha256 = "1gn085ddzn8psqfhmwcjzq2zrmb5gca2liap79a43wyw4gs8ip78";
+    };
+  }
+  {
+    name = "microsoft.netcore.targets";
+    version = "1.1.0";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/microsoft.netcore.targets/1.1.0/microsoft.netcore.targets.1.1.0.nupkg";
+      sha256 = "0idlsfwd9sn4p9jr1dqi14b8n2ly0k4dnjpvh8jfhxgnzzl98z5k";
+    };
+  }
+  {
+    name = "microsoft.netframework.referenceassemblies";
+    version = "1.0.0";
+    src = fetchurl {
+      url = "https://api.nuget.org/v3-flatcontainer/microsoft.netframework.referenceassemblies/1.0.0/microsoft.netframework.referenceassemblies.1.0.0.nupkg";
+      sha256 = "0na724xhvqm63vq9y18fl9jw9q2v99bdwr353378s5fsi11qzxp9";
+    };
+  }
+  {
+    name = "microsoft.netframework.referenceassemblies.net472";
+    version = "1.0.0";
+    src = fetchurl {
+      url = "https://api.nuget.org/v3-flatcontainer/microsoft.netframework.referenceassemblies.net472/1.0.0/microsoft.netframework.referenceassemblies.net472.1.0.0.nupkg";
+      sha256 = "1bqinq2nxnpqxziypg1sqy3ly0nymxxjpn8fwkn3rl4vl6gdg3rc";
+    };
+  }
+  {
+    name = "microsoft.net.sdk";
+    version = "3.1.400-preview.20365.20";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/microsoft.net.sdk/3.1.400-preview.20365.20/microsoft.net.sdk.3.1.400-preview.20365.20.nupkg";
+      sha256 = "02ann6rsnc6wl84wsk2fz7dpxcp5sq0b6jm3vv23av4b1f86f82y";
+    };
+  }
+  {
+    name = "microsoft.net.sdk.publish";
+    version = "3.1.300-servicing.20216.7";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/microsoft.net.sdk.publish/3.1.300-servicing.20216.7/microsoft.net.sdk.publish.3.1.300-servicing.20216.7.nupkg";
+      sha256 = "1xivqihp2zrkmd4f65fgh9hn9ix75sqklbnanqlfk9dq67wscp41";
+    };
+  }
+  {
+    name = "microsoft.net.sdk.razor";
+    version = "3.1.6";
+    src = fetchurl {
+      url = "https://api.nuget.org/v3-flatcontainer/microsoft.net.sdk.razor/3.1.6/microsoft.net.sdk.razor.3.1.6.nupkg";
+      sha256 = "1vw0zi0lq52frivq8mgfvm79rfx0v492q6fci1jls1zwwjk0v9ia";
+    };
+  }
+  {
+    name = "microsoft.net.sdk.web";
+    version = "3.1.300-servicing.20216.7";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/microsoft.net.sdk.web/3.1.300-servicing.20216.7/microsoft.net.sdk.web.3.1.300-servicing.20216.7.nupkg";
+      sha256 = "001jd2iwww0vb5x5dii915z82syh1aj48n62bn8zi1d3chwacr51";
+    };
+  }
+  {
+    name = "microsoft.net.sdk.web.projectsystem";
+    version = "3.1.300-servicing.20216.7";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/microsoft.net.sdk.web.projectsystem/3.1.300-servicing.20216.7/microsoft.net.sdk.web.projectsystem.3.1.300-servicing.20216.7.nupkg";
+      sha256 = "0601mix6l18h8afxxgdbbv695d0sjskady209z52sf4bvf4h4kal";
+    };
+  }
+  {
+    name = "microsoft.net.test.sdk";
+    version = "16.1.1";
+    src = fetchurl {
+      url = "https://api.nuget.org/v3-flatcontainer/microsoft.net.test.sdk/16.1.1/microsoft.net.test.sdk.16.1.1.nupkg";
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+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/system.xml.xdocument/4.3.0/system.xml.xdocument.4.3.0.nupkg";
+      sha256 = "14j57hlnmba6rwjwkxx8yp7rk5zf2dzq5j9f22j84jr0xxf00j2f";
+    };
+  }
+  {
+    name = "system.xml.xmldocument";
+    version = "4.0.1";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/system.xml.xmldocument/4.0.1/system.xml.xmldocument.4.0.1.nupkg";
+      sha256 = "1x2iz1l482876vjr11vsrl895n1bbaflxbj239dpf5a48p06gq7y";
+    };
+  }
+  {
+    name = "system.xml.xmlserializer";
+    version = "4.0.11";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/system.xml.xmlserializer/4.0.11/system.xml.xmlserializer.4.0.11.nupkg";
+      sha256 = "0987zp4nskf0dbsl3h4s5m1ianjcc398zmp2b98j4834c45jh0bm";
+    };
+  }
+  {
+    name = "system.xml.xpath";
+    version = "4.3.0";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/system.xml.xpath/4.3.0/system.xml.xpath.4.3.0.nupkg";
+      sha256 = "0hvn82chjynkixvvk9dy9djqvb0hlkbc2hy00gy27vjhd8i4iqkx";
+    };
+  }
+  {
+    name = "vswhere";
+    version = "2.6.7";
+    src = fetchurl {
+      url = "https://api.nuget.org/v3-flatcontainer/vswhere/2.6.7/vswhere.2.6.7.nupkg";
+      sha256 = "0h4k5i96p7633zzf4xsv7615f9x72rr5qr7b9934ri2y6gshfcwk";
+    };
+  }
+  {
+    name = "xlifftasks";
+    version = "1.0.0-beta.20206.1";
+    src = fetchurl {
+      url = "https://dotnetfeed.blob.core.windows.net/dotnet-core/flatcontainer/xlifftasks/1.0.0-beta.20206.1/xlifftasks.1.0.0-beta.20206.1.nupkg";
+      sha256 = "0xsfzws7rn9sfk4mgkbil21m8d3k3kccfk5f4g6lzvc1vk0pa26j";
+    };
+  }
+  {
+    name = "xunit";
+    version = "2.4.1";
+    src = fetchurl {
+      url = "https://api.nuget.org/v3-flatcontainer/xunit/2.4.1/xunit.2.4.1.nupkg";
+      sha256 = "0xf3kaywpg15flqaqfgywqyychzk15kz0kz34j21rcv78q9ywq20";
+    };
+  }
+  {
+    name = "xunit.abstractions";
+    version = "2.0.3";
+    src = fetchurl {
+      url = "https://api.nuget.org/v3-flatcontainer/xunit.abstractions/2.0.3/xunit.abstractions.2.0.3.nupkg";
+      sha256 = "00wl8qksgkxld76fgir3ycc5rjqv1sqds6x8yx40927q5py74gfh";
+    };
+  }
+  {
+    name = "xunit.analyzers";
+    version = "0.10.0";
+    src = fetchurl {
+      url = "https://api.nuget.org/v3-flatcontainer/xunit.analyzers/0.10.0/xunit.analyzers.0.10.0.nupkg";
+      sha256 = "15n02q3akyqbvkp8nq75a8rd66d4ax0rx8fhdcn8j78pi235jm7j";
+    };
+  }
+  {
+    name = "xunit.assert";
+    version = "2.4.1";
+    src = fetchurl {
+      url = "https://api.nuget.org/v3-flatcontainer/xunit.assert/2.4.1/xunit.assert.2.4.1.nupkg";
+      sha256 = "1imynzh80wxq2rp9sc4gxs4x1nriil88f72ilhj5q0m44qqmqpc6";
+    };
+  }
+  {
+    name = "xunit.core";
+    version = "2.4.1";
+    src = fetchurl {
+      url = "https://api.nuget.org/v3-flatcontainer/xunit.core/2.4.1/xunit.core.2.4.1.nupkg";
+      sha256 = "1nnb3j4kzmycaw1g76ii4rfqkvg6l8gqh18falwp8g28h802019a";
+    };
+  }
+  {
+    name = "xunit.extensibility.core";
+    version = "2.4.1";
+    src = fetchurl {
+      url = "https://api.nuget.org/v3-flatcontainer/xunit.extensibility.core/2.4.1/xunit.extensibility.core.2.4.1.nupkg";
+      sha256 = "103qsijmnip2pnbhciqyk2jyhdm6snindg5z2s57kqf5pcx9a050";
+    };
+  }
+  {
+    name = "xunit.extensibility.execution";
+    version = "2.4.1";
+    src = fetchurl {
+      url = "https://api.nuget.org/v3-flatcontainer/xunit.extensibility.execution/2.4.1/xunit.extensibility.execution.2.4.1.nupkg";
+      sha256 = "1pbilxh1gp2ywm5idfl0klhl4gb16j86ib4x83p8raql1dv88qia";
+    };
+  }
+  {
+    name = "xunit.runner.console";
+    version = "2.4.1";
+    src = fetchurl {
+      url = "https://api.nuget.org/v3-flatcontainer/xunit.runner.console/2.4.1/xunit.runner.console.2.4.1.nupkg";
+      sha256 = "13ykz9anhz72xc4q6byvdfwrp54hlcbl6zsfapwfhnzyvfgb9w13";
+    };
+  }
+  {
+    name = "xunit.runner.visualstudio";
+    version = "2.4.1";
+    src = fetchurl {
+      url = "https://api.nuget.org/v3-flatcontainer/xunit.runner.visualstudio/2.4.1/xunit.runner.visualstudio.2.4.1.nupkg";
+      sha256 = "0fln5pk18z98gp0zfshy1p9h6r9wc55nyqhap34k89yran646vhn";
+    };
+  }
+]
diff --git a/pkgs/development/tools/build-managers/msbuild/nuget.nix b/pkgs/development/tools/build-managers/msbuild/nuget.nix
deleted file mode 100644
index 4061f3d1b9e5..000000000000
--- a/pkgs/development/tools/build-managers/msbuild/nuget.nix
+++ /dev/null
@@ -1,1326 +0,0 @@
-{ fetchurl }: [
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/largeaddressaware/1.0.3/largeaddressaware.1.0.3.nupkg";
-    sha256 = "1ppss9bgj0hf5s8307bnm2a4qm10mrymp0v12m28a5q81zjz0fr5";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microbuild.core/0.2.0/microbuild.core.0.2.0.nupkg";
-    sha256 = "0q4s45jskbyxfx4ay6znnvv94zma2wd85b8rwmwszd2nb0xl3194";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.build/14.3.0/microsoft.build.14.3.0.nupkg";
-    sha256 = "1zamn3p8xxi0wsjlpln0y71ncb977f3fp08mvaz4wmbmi76nr0rz";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.build.centralpackageversions/2.0.1/microsoft.build.centralpackageversions.2.0.1.nupkg";
-    sha256 = "17cjiaj2b98q8s89168g42jb8rhwm6062jcbv57rbkdiiwdsn55k";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.build.framework/14.3.0/microsoft.build.framework.14.3.0.nupkg";
-    sha256 = "0r7y1i7dbr3pb53fdrh268hyi627w85nzv2iblwyg8dzkfxraafd";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.build.framework/15.5.180/microsoft.build.framework.15.5.180.nupkg";
-    sha256 = "064y3a711ikx9pm9d2wyms4i3k4f9hfvn3vymhwygg7yv7gcj92z";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.build.tasks.git/1.0.0-beta2-19367-01/microsoft.build.tasks.git.1.0.0-beta2-19367-01.nupkg";
-    sha256 = "1f6lqp86ybdgf0clmszpbqhhddynky7xl43fawvgnvz0bb2xw73j";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.build.utilities.core/14.3.0/microsoft.build.utilities.core.14.3.0.nupkg";
-    sha256 = "0351nsnx12nzkss6vaqwwh7d7car7hrgyh0vyd4bl83c4x3ls1kb";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.build.utilities.core/15.5.180/microsoft.build.utilities.core.15.5.180.nupkg";
-    sha256 = "0c4bjhaqgc98bchln8p5d2p1vyn8qrha2b8gpn2l7bnznbcrd630";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.codecoverage/15.9.0/microsoft.codecoverage.15.9.0.nupkg";
-    sha256 = "10v5xrdilnm362g9545qxvlrbwc9vn65jhpb1i0jlhyqsj6bfwzg";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.csharp/4.3.0/microsoft.csharp.4.3.0.nupkg";
-    sha256 = "0gw297dgkh0al1zxvgvncqs0j15lsna9l1wpqas4rflmys440xvb";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.dotnet.platformabstractions/1.0.3/microsoft.dotnet.platformabstractions.1.0.3.nupkg";
-    sha256 = "1nayc88w80jrmnf3mkq0fk2bjhpgnk59m9yl40d9qfj06bzvckxl";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.dotnet.platformabstractions/2.1.0/microsoft.dotnet.platformabstractions.2.1.0.nupkg";
-    sha256 = "1qydvyyinj3b5mraazjal3n2k7jqhn05b6n1a2f3qjkqkxi63dmy";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.extensions.dependencymodel/1.0.3/microsoft.extensions.dependencymodel.1.0.3.nupkg";
-    sha256 = "1vclzbn8aq3wnvib34kr8g86gi37r6hn1ax9nc1sllid3h026irl";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.extensions.dependencymodel/2.1.0/microsoft.extensions.dependencymodel.2.1.0.nupkg";
-    sha256 = "0dl4qhjgifm6v3jsfzvzkvddyic77ggp9fq49ah661v45gk6ilgd";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.netcore.dotnetapphost/2.1.0/microsoft.netcore.dotnetapphost.2.1.0.nupkg";
-    sha256 = "10hnhkix2av0c7djp2q88pw407m8gk3im4r06x762a3cs6f2jprd";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.netcore.dotnethostpolicy/2.1.0/microsoft.netcore.dotnethostpolicy.2.1.0.nupkg";
-    sha256 = "1xh8ij7zyfkrk20rgpwqs00mxdy2qiwr7qar2xk397zk2bh2d90n";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.netcore.dotnethostresolver/2.1.0/microsoft.netcore.dotnethostresolver.2.1.0.nupkg";
-    sha256 = "1384k3cg4sjcn3hyalcm43fhmlfj5pnywpzd9zpgc4jsr2c16x76";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.netcore.platforms/1.0.1/microsoft.netcore.platforms.1.0.1.nupkg";
-    sha256 = "01al6cfxp68dscl15z7rxfw9zvhm64dncsw09a1vmdkacsa2v6lr";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.netcore.platforms/1.1.0/microsoft.netcore.platforms.1.1.0.nupkg";
-    sha256 = "08vh1r12g6ykjygq5d3vq09zylgb84l63k49jc4v8faw9g93iqqm";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.netcore.platforms/1.1.1/microsoft.netcore.platforms.1.1.1.nupkg";
-    sha256 = "164wycgng4mi9zqi2pnsf1pq6gccbqvw6ib916mqizgjmd8f44pj";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.netcore.platforms/2.1.0/microsoft.netcore.platforms.2.1.0.nupkg";
-    sha256 = "0nmdnkmwyxj8cp746hs9an57zspqlmqdm55b00i7yk8a22s6akxz";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.netcore.targets/1.0.1/microsoft.netcore.targets.1.0.1.nupkg";
-    sha256 = "0ppdkwy6s9p7x9jix3v4402wb171cdiibq7js7i13nxpdky7074p";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.net.test.sdk/15.9.0/microsoft.net.test.sdk.15.9.0.nupkg";
-    sha256 = "0g7wjgiigs4v8qa32g9ysqgx8bx55dzmbxfkc4ic95mpd1vkjqxw";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.sourcelink.common/1.0.0-beta2-19367-01/microsoft.sourcelink.common.1.0.0-beta2-19367-01.nupkg";
-    sha256 = "1p4zyz0jmq53k2zlaqq6qhy0shyjz2i9wfllw9kg8hsm1rwig1p6";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.sourcelink.github/1.0.0-beta2-19367-01/microsoft.sourcelink.github.1.0.0-beta2-19367-01.nupkg";
-    sha256 = "0c4l82jnc0prkwcjawhpqx1i5439ryj53gbphqlv3snq7alv3vdd";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.sourcelink.vsts.git/1.0.0-beta2-19367-01/microsoft.sourcelink.vsts.git.1.0.0-beta2-19367-01.nupkg";
-    sha256 = "0si4xx30c9s8sfhlq3s5ll9grli2d36ic5bcp7pms7yls0cg0ik4";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.testplatform.objectmodel/15.9.0/microsoft.testplatform.objectmodel.15.9.0.nupkg";
-    sha256 = "0xj09b2pmf573dl0zhfgbs3qf2073yipnx55spvf7h2qvyqvf7db";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.testplatform.testhost/15.9.0/microsoft.testplatform.testhost.15.9.0.nupkg";
-    sha256 = "1srhq00bs44yv56k2zyxglkm2b7fs4fhvfr1clapaiz09rnqspl3";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.visualstudio.sdk.embedinteroptypes/15.0.15/microsoft.visualstudio.sdk.embedinteroptypes.15.0.15.nupkg";
-    sha256 = "0chr3slzzcanwcyd9isx4gichqzmfh4zd3h83piw0r4xsww1wmpd";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.visualstudio.setup.configuration.interop/1.16.30/microsoft.visualstudio.setup.configuration.interop.1.16.30.nupkg";
-    sha256 = "14022lx03vdcqlvbbdmbsxg5pqfx1rfq2jywxlyaz9v68cvsb0g4";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.win32.primitives/4.3.0/microsoft.win32.primitives.4.3.0.nupkg";
-    sha256 = "0j0c1wj4ndj21zsgivsc24whiya605603kxrbiw6wkfdync464wq";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/microsoft.win32.registry/4.0.0/microsoft.win32.registry.4.0.0.nupkg";
-    sha256 = "1spf4m9pikkc19544p29a47qnhcd885klncahz133hbnyqbkmz9k";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/netstandard.library/1.6.0/netstandard.library.1.6.0.nupkg";
-    sha256 = "0nmmv4yw7gw04ik8ialj3ak0j6pxa9spih67hnn1h2c38ba8h58k";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/netstandard.library/1.6.1/netstandard.library.1.6.1.nupkg";
-    sha256 = "1z70wvsx2d847a2cjfii7b83pjfs34q05gb037fdjikv5kbagml8";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/netstandard.library/2.0.3/netstandard.library.2.0.3.nupkg";
-    sha256 = "1fn9fxppfcg4jgypp2pmrpr6awl3qz1xmnri0cygpkwvyx27df1y";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/runtime.native.system/4.0.0/runtime.native.system.4.0.0.nupkg";
-    sha256 = "1ppk69xk59ggacj9n7g6fyxvzmk1g5p4fkijm0d7xqfkig98qrkf";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/runtime.native.system/4.3.0/runtime.native.system.4.3.0.nupkg";
-    sha256 = "15hgf6zaq9b8br2wi1i3x0zvmk410nlmsmva9p0bbg73v6hml5k4";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/runtime.native.system.net.http/4.3.0/runtime.native.system.net.http.4.3.0.nupkg";
-    sha256 = "1n6rgz5132lcibbch1qlf0g9jk60r0kqv087hxc0lisy50zpm7kk";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/runtime.native.system.security.cryptography.openssl/4.3.0/runtime.native.system.security.cryptography.openssl.4.3.0.nupkg";
-    sha256 = "18pzfdlwsg2nb1jjjjzyb5qlgy6xjxzmhnfaijq5s2jw3cm3ab97";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/runtime.native.system.security.cryptography.openssl/4.3.2/runtime.native.system.security.cryptography.openssl.4.3.2.nupkg";
-    sha256 = "0zy5r25jppz48i2bkg8b9lfig24xixg6nm3xyr1379zdnqnpm8f6";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/runtime.ubuntu.16.10-x64.runtime.native.system.security.cryptography.openssl/4.3.0/runtime.ubuntu.16.10-x64.runtime.native.system.security.cryptography.openssl.4.3.0.nupkg";
-    sha256 = "1p4dgxax6p7rlgj4q73k73rslcnz4wdcv8q2flg1s8ygwcm58ld5";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/runtime.ubuntu.16.10-x64.runtime.native.system.security.cryptography.openssl/4.3.2/runtime.ubuntu.16.10-x64.runtime.native.system.security.cryptography.openssl.4.3.2.nupkg";
-    sha256 = "1x0g58pbpjrmj2x2qw17rdwwnrcl0wvim2hdwz48lixvwvp22n9c";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/runtime.win-x64.microsoft.netcore.app/2.1.0/runtime.win-x64.microsoft.netcore.app.2.1.0.nupkg";
-    sha256 = "11447rh8rbazksj5bp3gvvdl33glq37ajc1ds18xrr69b1shxzrl";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/runtime.win-x64.microsoft.netcore.dotnetapphost/2.1.0/runtime.win-x64.microsoft.netcore.dotnetapphost.2.1.0.nupkg";
-    sha256 = "0g6kdwycs7zxyzks98az54zzs5s7cms5x0zklxhl93ldr847nw07";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/runtime.win-x64.microsoft.netcore.dotnethostpolicy/2.1.0/runtime.win-x64.microsoft.netcore.dotnethostpolicy.2.1.0.nupkg";
-    sha256 = "14qr09a9gq3x3licvqfwsbh3m4kdp3jh47xgajhhy6ycs66rgpba";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/runtime.win-x64.microsoft.netcore.dotnethostresolver/2.1.0/runtime.win-x64.microsoft.netcore.dotnethostresolver.2.1.0.nupkg";
-    sha256 = "1x14nq85ciaqrj32k5cnb7f8dj3xw2wfp1idnyrc9cks3xkpmqd6";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/runtime.win-x86.microsoft.netcore.app/2.1.0/runtime.win-x86.microsoft.netcore.app.2.1.0.nupkg";
-    sha256 = "0dqdh0k30nqdrgz24aldvghhcpw8fj10gdwpgy4nzn7gsbzni6x4";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/runtime.win-x86.microsoft.netcore.dotnetapphost/2.1.0/runtime.win-x86.microsoft.netcore.dotnetapphost.2.1.0.nupkg";
-    sha256 = "1qrx237qb5lp2zm2c8hnj1k9jzhcf718davalsaxyvipbs1bkhnx";
-  })
-  (fetchurl {
-    url = "https://api.nuget.org/v3-flatcontainer/runtime.win-x86.microsoft.netcore.dotnethostpolicy/2.1.0/runtime.win-x86.microsoft.netcore.dotnethostpolicy.2.1.0.nupkg";
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