Merge pull request #283982 from helsinki-systems/fix/ruby-prometheus-client-mmap-rustc-dep

ruby-modules/gem-config: make prometheus-client-mmap not have a rustc runtime dependency

pkgs/development/ruby-modules/gem-config/default.nix

@@ -320,10 +320,16 @@ in
       rustPlatform.cargoSetupHook
       rustPlatform.bindgenHook
     ];
+    disallowedReferences = [
+      rustc.unwrapped
+    ];
     preBuild = ''
       cat ../.cargo/config > ext/fast_mmaped_file_rs/.cargo/config.toml
       sed -i "s|cargo-vendor-dir|$PWD/../cargo-vendor-dir|" ext/fast_mmaped_file_rs/.cargo/config.toml
     '';
+    postInstall = ''
+      find $out -type f -name .rustc_info.json -delete
+    '';
   };
 
   glib2 = attrs: {