diff --git a/pkgs/development/compilers/rustc/generic.nix b/pkgs/development/compilers/rustc/generic.nix
index d578facad69..8be2ec05f07 100644
--- a/pkgs/development/compilers/rustc/generic.nix
+++ b/pkgs/development/compilers/rustc/generic.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, fetchgit, fetchzip, file, python2, tzdata, procps
-, llvmPackages_37, jemalloc, ncurses
+, llvmPackages_37, jemalloc, ncurses, darwin
 
 , shortVersion, isRelease
 , forceBundledLLVM ? false
@@ -10,7 +10,7 @@
 , configureFlags ? []
 
 , patches
-}:
+} @ args:
 
 assert !stdenv.isFreeBSD;
 
@@ -37,6 +37,8 @@ let version = if isRelease then
 
     name = "rustc-${version}";
 
+    procps = if stdenv.isDarwin then darwin.ps else args.procps;
+
     llvmShared = llvmPackages_37.llvm.override { enableSharedLibraries = true; };
 
     platform = if stdenv.system == "i686-linux"
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 471c83538b3..a05cf918ffa 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -5062,11 +5062,7 @@ let
   rtags = callPackage ../development/tools/rtags/default.nix {};
 
   rustcMaster = callPackage ../development/compilers/rustc/head.nix {};
-  rustc = callPackage ../development/compilers/rustc {
-    callPackage = newScope ({
-      procps = if stdenv.isDarwin then darwin.ps else procps;
-    });
-  };
+  rustc = callPackage ../development/compilers/rustc {};
 
   rustPlatform = rustStable;