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-rw-r--r--pkgs/development/libraries/tbb/default.nix6
1 files changed, 2 insertions, 4 deletions
diff --git a/pkgs/development/libraries/tbb/default.nix b/pkgs/development/libraries/tbb/default.nix
index 0ec5d8ad15dd..18f9e541acd4 100644
--- a/pkgs/development/libraries/tbb/default.nix
+++ b/pkgs/development/libraries/tbb/default.nix
@@ -11,10 +11,8 @@ with stdenv.lib; stdenv.mkDerivation rec {
     sha256 = "1a39nflw7b2n51jfp3fdprnkpgzaspzww1dckfvaigflfli9s8rj";
   };
 
-  makeFlags = concatStringsSep " " (
-    optional (compiler != null) "compiler=${compiler}" ++
-    optional (stdver != null) "stdver=${stdver}"
-  );
+  makeFlags = optional (compiler != null) "compiler=${compiler}"
+    ++ optional (stdver != null) "stdver=${stdver}";
 
   patches = stdenv.lib.optional stdenv.hostPlatform.isMusl ./glibc-struct-mallinfo.patch;