diff --git a/pkgs/development/compilers/fasmg/default.nix b/pkgs/development/compilers/fasmg/default.nix
new file mode 100644
index 000000000000..5233e248c074
--- /dev/null
+++ b/pkgs/development/compilers/fasmg/default.nix
@@ -0,0 +1,58 @@
+{ stdenv
+, fetchzip
+}:
+
+stdenv.mkDerivation rec {
+  pname = "fasmg";
+  version = "j27m";
+
+  src = fetchzip {
+    url = "https://flatassembler.net/fasmg.${version}.zip";
+    sha256 = "0qmklb24n3r0my2risid8r61pi88gqrvm1c0xvyd0bp1ans6d7zd";
+    stripRoot = false;
+  };
+
+  buildPhase = let
+    inherit (stdenv.hostPlatform) system;
+
+    path = {
+      x86_64-linux = {
+        bin = "fasmg.x64";
+        asm = "source/linux/x64/fasmg.asm";
+      };
+      x86_64-darwin = {
+        bin = "source/macos/x64/fasmg";
+        asm = "source/macos/x64/fasmg.asm";
+      };
+      x86-linux = {
+        bin = "fasmg";
+        asm = "source/linux/fasmg.asm";
+      };
+      x86-darwin = {
+        bin = "source/macos/fasmg";
+        asm = "source/macos/fasmg.asm";
+      };
+    }.${system} or (throw "Unsopported system: ${system}");
+
+  in ''
+    chmod +x ${path.bin}
+    ./${path.bin} ${path.asm} fasmg
+  '';
+
+  outputs = [ "out" "doc" ];
+
+  installPhase = ''
+    install -Dm755 fasmg $out/bin/fasmg
+
+    mkdir -p $doc/share/doc/fasmg
+    cp docs/*.txt $doc/share/doc/fasmg
+  '';
+
+  meta = with stdenv.lib; {
+    description = "x86(-64) macro assembler to binary, MZ, PE, COFF, and ELF";
+    homepage = "https://flatassembler.net";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ orivej luc65r ];
+    platforms = with platforms; intersectLists (linux ++ darwin) x86;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 11a8a1ccae33..4b3c546f8116 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -8770,6 +8770,8 @@ in
   };
   fasm-bin = callPackage ../development/compilers/fasm/bin.nix { };
 
+  fasmg = callPackage ../development/compilers/fasmg { };
+
   flyctl = callPackage ../development/web/flyctl { };
 
   flutterPackages =