diff --git a/pkgs/by-name/ps/ps3-disc-dumper/package.nix b/pkgs/by-name/ps/ps3-disc-dumper/package.nix
index 7d90e7ad1549..59553b16acda 100644
--- a/pkgs/by-name/ps/ps3-disc-dumper/package.nix
+++ b/pkgs/by-name/ps/ps3-disc-dumper/package.nix
@@ -27,12 +27,6 @@ buildDotnetModule rec {
   projectFile = "UI.Avalonia/UI.Avalonia.csproj";
   nugetDeps = ./deps.json;
 
-  preConfigureNuGet = ''
-    # This should really be in the upstream nuget.config
-    dotnet nuget add source https://api.nuget.org/v3/index.json \
-      -n nuget.org --configfile nuget.config
-  '';
-
   runtimeDeps = [
     zlib
     openssl
diff --git a/pkgs/by-name/re/recyclarr/package.nix b/pkgs/by-name/re/recyclarr/package.nix
index f729757aed3a..7ac3bb36fb62 100644
--- a/pkgs/by-name/re/recyclarr/package.nix
+++ b/pkgs/by-name/re/recyclarr/package.nix
@@ -1,22 +1,12 @@
 {
   lib,
   openssl,
-  writeText,
   git,
   buildDotnetModule,
   dotnetCorePackages,
   fetchFromGitHub,
   testers,
 }:
-let
-  nuget-config = writeText "nuget.config" ''
-    <configuration>
-      <packageSources>
-        <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
-      </packageSources>
-    </configuration>
-  '';
-in
 buildDotnetModule (finalAttrs: {
   pname = "recyclarr";
   version = "7.4.1";
@@ -47,8 +37,6 @@ buildDotnetModule (finalAttrs: {
 
   enableParallelBuilding = false;
 
-  dotnetRestoreFlags = [ "--configfile=${nuget-config}" ];
-
   doCheck = false;
 
   dotnet-sdk = dotnetCorePackages.sdk_9_0;
diff --git a/pkgs/development/compilers/dotnet/dotnet-sdk-setup-hook.sh b/pkgs/development/compilers/dotnet/dotnet-sdk-setup-hook.sh
index 76f8734d4e12..fc4a5ba9f315 100644
--- a/pkgs/development/compilers/dotnet/dotnet-sdk-setup-hook.sh
+++ b/pkgs/development/compilers/dotnet/dotnet-sdk-setup-hook.sh
@@ -85,6 +85,7 @@ configureNuget() {
     rootConfig=$(find . -maxdepth 1 -iname nuget.config -print -quit)
     if [[ -z $rootConfig ]]; then
         dotnet new nugetconfig
+        rootConfig=nuget.config
     fi
 
     (
@@ -100,6 +101,12 @@ configureNuget() {
             -i /configuration/packageSources/__new -t attr -n value -v "$nugetSource"
             -r /configuration/packageSources/__new -v add)
 
+        if [[ -n ${keepNugetConfig-} ]] &&
+            ! @xmlstarlet@/bin/xmlstarlet select -t -i "/configuration/packageSources/clear" -nl "$rootConfig" &&
+            ! @xmlstarlet@/bin/xmlstarlet select -t -i "/configuration/packageSources/add[@value='https://api.nuget.org/v3/index.json' or @key='nuget.org']" -nl "$rootConfig"; then
+            dotnet nuget add source https://api.nuget.org/v3/index.json --name nuget.org --configfile "$rootConfig"
+        fi
+
         if [[ -z ${keepNugetConfig-} ]]; then
             xmlConfigArgs+=(-d '//configuration/*')
             xmlRootConfigArgs+=("${xmlSourceConfigArgs[@]}")