diff --git a/pkgs/build-support/dotnet/fetch-nupkg/default.nix b/pkgs/build-support/dotnet/fetch-nupkg/default.nix
new file mode 100644
index 000000000000..66bf503a6518
--- /dev/null
+++ b/pkgs/build-support/dotnet/fetch-nupkg/default.nix
@@ -0,0 +1,67 @@
+{
+  symlinkJoin,
+  fetchurl,
+  stdenvNoCC,
+  lib,
+  unzip,
+  patchNupkgs,
+  nugetPackageHook,
+}:
+{
+  pname,
+  version,
+  sha256 ? "",
+  hash ? "",
+  url ? "https://www.nuget.org/api/v2/package/${pname}/${version}",
+  installable ? false,
+}:
+stdenvNoCC.mkDerivation rec {
+  inherit pname version;
+
+  src = fetchurl {
+    name = "${pname}.${version}.nupkg";
+    # There is no need to verify whether both sha256 and hash are
+    # valid here, because nuget-to-nix does not generate a deps.nix
+    # containing both.
+    inherit
+      url
+      sha256
+      hash
+      version
+      ;
+  };
+
+  nativeBuildInputs = [
+    unzip
+    patchNupkgs
+    nugetPackageHook
+  ];
+
+  unpackPhase = ''
+    unzip -nqd source $src
+    chmod -R +rw source
+    cd source
+  '';
+
+  prePatch = ''
+    shopt -s nullglob
+    local dir
+    for dir in tools runtimes/*/native; do
+      [[ ! -d "$dir" ]] || chmod -R +x "$dir"
+    done
+    rm -rf .signature.p7s
+  '';
+
+  installPhase = ''
+    dir=$out/share/nuget/packages/${lib.toLower pname}/${lib.toLower version}
+    mkdir -p $dir
+    cp -r . $dir
+    echo {} > "$dir"/.nupkg.metadata
+  '';
+
+  preFixup = ''
+    patch-nupkgs $out/share/nuget/packages
+  '';
+
+  createInstallableNugetSource = installable;
+}
diff --git a/pkgs/build-support/dotnet/make-nuget-deps/default.nix b/pkgs/build-support/dotnet/make-nuget-deps/default.nix
index 7266a2913732..efc3d07e9777 100644
--- a/pkgs/build-support/dotnet/make-nuget-deps/default.nix
+++ b/pkgs/build-support/dotnet/make-nuget-deps/default.nix
@@ -5,6 +5,7 @@
 , unzip
 , patchNupkgs
 , nugetPackageHook
+, fetchNupkg
 }:
 lib.makeOverridable(
   { name
@@ -15,57 +16,7 @@ lib.makeOverridable(
   (symlinkJoin {
     name = "${name}-nuget-deps";
     paths = nugetDeps {
-      fetchNuGet =
-        { pname
-        , version
-        , sha256 ? ""
-        , hash ? ""
-        , url ? "https://www.nuget.org/api/v2/package/${pname}/${version}" }:
-        stdenvNoCC.mkDerivation rec {
-          inherit pname version;
-
-          src = fetchurl {
-            name = "${pname}.${version}.nupkg";
-            # There is no need to verify whether both sha256 and hash are
-            # valid here, because nuget-to-nix does not generate a deps.nix
-            # containing both.
-            inherit url sha256 hash version;
-          };
-
-          nativeBuildInputs = [
-            unzip
-            patchNupkgs
-            nugetPackageHook
-          ];
-
-          unpackPhase = ''
-            unzip -nqd source $src
-            chmod -R +rw source
-            cd source
-          '';
-
-          prePatch = ''
-            shopt -s nullglob
-            local dir
-            for dir in tools runtimes/*/native; do
-              [[ ! -d "$dir" ]] || chmod -R +x "$dir"
-            done
-            rm -rf .signature.p7s
-          '';
-
-          installPhase = ''
-            dir=$out/share/nuget/packages/${lib.toLower pname}/${lib.toLower version}
-            mkdir -p $dir
-            cp -r . $dir
-            echo {} > "$dir"/.nupkg.metadata
-          '';
-
-          preFixup = ''
-            patch-nupkgs $out/share/nuget/packages
-          '';
-
-          createInstallableNugetSource = installable;
-        };
+      fetchNuGet = args: fetchNupkg (args // { inherit installable; });
     };
   }) // {
     inherit sourceFile;
diff --git a/pkgs/development/compilers/dotnet/default.nix b/pkgs/development/compilers/dotnet/default.nix
index 0604e5706b02..fec4583bf558 100644
--- a/pkgs/development/compilers/dotnet/default.nix
+++ b/pkgs/development/compilers/dotnet/default.nix
@@ -53,6 +53,7 @@ makeScopeWithSplicing' {
 
       mkNugetSource = callPackage ../../../build-support/dotnet/make-nuget-source { };
       mkNugetDeps = callPackage ../../../build-support/dotnet/make-nuget-deps { };
+      fetchNupkg = callPackage ../../../build-support/dotnet/fetch-nupkg { };
 
       dotnet_8 = recurseIntoAttrs (callPackage ./8 { bootstrapSdk = dotnet_8_0.sdk_8_0_1xx; });
       dotnet_9 = recurseIntoAttrs (callPackage ./9 {});