2 files changed, 2 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;
 
diff --git a/pkgs/development/libraries/glib/default.nix b/pkgs/development/libraries/glib/default.nix
index 839ba7cfa95..0e41082bcbf 100644
--- a/pkgs/development/libraries/glib/default.nix
+++ b/pkgs/development/libraries/glib/default.nix
@@ -77,6 +77,7 @@ stdenv.mkDerivation rec {
     '';
 
   enableParallelBuilding = true;
+  DETERMINISTIC_BUILD = 1;
 
   inherit doCheck;
   preCheck = optionalString doCheck