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-rw-r--r--pkgs/development/interpreters/python/2.7/default.nix1
1 files changed, 1 insertions, 0 deletions
diff --git a/pkgs/development/interpreters/python/2.7/default.nix b/pkgs/development/interpreters/python/2.7/default.nix
index c19430862c2..05fb8134f85 100644
--- a/pkgs/development/interpreters/python/2.7/default.nix
+++ b/pkgs/development/interpreters/python/2.7/default.nix
@@ -72,6 +72,7 @@ let
       '';
 
     NIX_CFLAGS_COMPILE = optionalString stdenv.isDarwin "-msse2";
+    DETERMINISTIC_BUILD = 1;
 
     setupHook = ./setup-hook.sh;