1 files changed, 7 insertions, 2 deletions
diff --git a/nixpkgs/pkgs/build-support/rust/default.nix b/nixpkgs/pkgs/build-support/rust/default.nix
index 5ff430475caa..2193a5825dfd 100644
--- a/nixpkgs/pkgs/build-support/rust/default.nix
+++ b/nixpkgs/pkgs/build-support/rust/default.nix
@@ -16,6 +16,7 @@ let
     , cargoDepsHook ? ""
     , cargoBuildFlags ? []
     , buildType ? "release"
+    , meta ? {}
 
     , cargoVendorDir ? null
     , ... } @ args:
@@ -47,7 +48,6 @@ let
       ccForHost="${stdenv.cc}/bin/${stdenv.cc.targetPrefix}cc";
       cxxForHost="${stdenv.cc}/bin/${stdenv.cc.targetPrefix}c++";
       releaseDir = "target/${stdenv.hostPlatform.config}/${buildType}";
-
     in stdenv.mkDerivation (args // {
       inherit cargoDeps;
 
@@ -105,7 +105,7 @@ let
           "CC_${stdenv.hostPlatform.config}"="${ccForHost}" \
           "CXX_${stdenv.hostPlatform.config}"="${cxxForHost}" \
           cargo build \
-            --${buildType} \
+            ${stdenv.lib.optionalString (buildType == "release") "--release"} \
             --target ${stdenv.hostPlatform.config} \
             --frozen ${concatStringsSep " " cargoBuildFlags}
         )
@@ -149,6 +149,11 @@ let
       '';
 
       passthru = { inherit cargoDeps; } // (args.passthru or {});
+
+      meta = {
+        # default to Rust's platforms
+        platforms = rustc.meta.platforms;
+      } // meta;
     }) // {
       overrideRustAttrs = f: buildRustPackage (args // (f args));
     };