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-rw-r--r--pkgs/development/interpreters/python/2.7/default.nix6
1 files changed, 6 insertions, 0 deletions
diff --git a/pkgs/development/interpreters/python/2.7/default.nix b/pkgs/development/interpreters/python/2.7/default.nix
index 88147fef31dc..8b8699db77d8 100644
--- a/pkgs/development/interpreters/python/2.7/default.nix
+++ b/pkgs/development/interpreters/python/2.7/default.nix
@@ -33,6 +33,12 @@ stdenv.mkDerivation {
   patches =
     [ # Look in C_INCLUDE_PATH and LIBRARY_PATH for stuff.
       ./search-path.patch
+
+      # Python recompiles a Python if the mtime stored *in* the
+      # pyc/pyo file differs from the mtime of the source file.  This
+      # doesn't work in Nix because Nix changes the mtime of files in
+      # the Nix store to 1.  So treat that as a special case.
+      ./nix-store-mtime.patch
     ];
 
   inherit buildInputs;