diff --git a/pkgs/development/compilers/mono/6.nix b/pkgs/development/compilers/mono/6.nix
new file mode 100644
index 000000000000..ec91d7e979c1
--- /dev/null
+++ b/pkgs/development/compilers/mono/6.nix
@@ -0,0 +1,9 @@
+{ callPackage, Foundation, libobjc }:
+
+callPackage ./generic.nix (rec {
+  inherit Foundation libobjc;
+  version = "6.0.0.313";
+  srcArchiveSuffix = "tar.xz";
+  sha256 = "0l0cd6q5xh1vdm6zr78rkfqdsmrgzanjgpxvgig0pyd3glfyjim9";
+  enableParallelBuilding = true;
+})
diff --git a/pkgs/development/compilers/mono/generic.nix b/pkgs/development/compilers/mono/generic.nix
index 43ef5d4b62d1..6b5c15642a5c 100644
--- a/pkgs/development/compilers/mono/generic.nix
+++ b/pkgs/development/compilers/mono/generic.nix
@@ -1,14 +1,16 @@
-{ stdenv, fetchurl, bison, pkgconfig, glib, gettext, perl, libgdiplus, libX11, callPackage, ncurses, zlib, withLLVM ? false, cacert, Foundation, libobjc, python, version, sha256, autoconf, libtool, automake, cmake, which, enableParallelBuilding ? true }:
+{ stdenv, fetchurl, bison, pkgconfig, glib, gettext, perl, libgdiplus, libX11, callPackage, ncurses, zlib, withLLVM ? false, cacert, Foundation, libobjc, python, version, sha256, autoconf, libtool, automake, cmake, which
+, enableParallelBuilding ? true
+, srcArchiveSuffix ? "tar.bz2"
+}:
 
 let
   llvm     = callPackage ./llvm.nix { };
 in
 stdenv.mkDerivation rec {
   name = "mono-${version}";
-
   src = fetchurl {
     inherit sha256;
-    url = "https://download.mono-project.com/sources/mono/${name}.tar.bz2";
+    url = "https://download.mono-project.com/sources/mono/${name}.${srcArchiveSuffix}";
   };
 
   buildInputs =
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 31b0622d656f..60abd188a5fe 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -8105,6 +8105,11 @@ in
     inherit (darwin.apple_sdk.frameworks) Foundation;
   };
 
+  mono6 = callPackage ../development/compilers/mono/6.nix {
+    inherit (darwin) libobjc;
+    inherit (darwin.apple_sdk.frameworks) Foundation;
+  };
+
   monoDLLFixer = callPackage ../build-support/mono-dll-fixer { };
 
   mosml = callPackage ../development/compilers/mosml { };