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-rw-r--r--pkgs/development/interpreters/python/cpython/2.7/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/development/interpreters/python/cpython/2.7/default.nix b/pkgs/development/interpreters/python/cpython/2.7/default.nix
index 706dd931c7851..9cd806c052333 100644
--- a/pkgs/development/interpreters/python/cpython/2.7/default.nix
+++ b/pkgs/development/interpreters/python/cpython/2.7/default.nix
@@ -256,7 +256,7 @@ in with passthru; stdenv.mkDerivation ({
     LDFLAGS = lib.optionalString (!stdenv.isDarwin) "-lgcc_s";
     inherit (mkPaths buildInputs) C_INCLUDE_PATH LIBRARY_PATH;
 
-    NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.targetPlatform.system == "x86_64-darwin") "-msse2"
+    env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.targetPlatform.system == "x86_64-darwin") "-msse2"
       + lib.optionalString stdenv.hostPlatform.isMusl " -DTHREAD_STACK_SIZE=0x100000";
     DETERMINISTIC_BUILD = 1;