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-rw-r--r--nixpkgs/pkgs/development/libraries/py3c/default.nix4
1 files changed, 3 insertions, 1 deletions
diff --git a/nixpkgs/pkgs/development/libraries/py3c/default.nix b/nixpkgs/pkgs/development/libraries/py3c/default.nix
index eec051f0cc1c..e46d01d0627a 100644
--- a/nixpkgs/pkgs/development/libraries/py3c/default.nix
+++ b/nixpkgs/pkgs/development/libraries/py3c/default.nix
@@ -11,7 +11,9 @@ stdenv.mkDerivation rec {
     sha256 = "04i2z7hrig78clc59q3i1z2hh24g7z1bfvxznlzxv00d4s57nhpi";
   };
 
-  postPatch = lib.optionalString stdenv.cc.isClang ''
+  postPatch = ''
+    # clang and gcc-11 complain about 'register' keywords used by
+    # python-2.7. Let's avoid blanket -Werror.
     substituteInPlace test/setup.py \
       --replace "'-Werror', " ""
   '';