diff --git a/pkgs/development/interpreters/python/cpython/2.7/default.nix b/pkgs/development/interpreters/python/cpython/2.7/default.nix
index 4ac827db7cb6..eb2a46cb3b79 100644
--- a/pkgs/development/interpreters/python/cpython/2.7/default.nix
+++ b/pkgs/development/interpreters/python/cpython/2.7/default.nix
@@ -128,7 +128,7 @@ let
     ++ optional hostPlatform.isCygwin expat
     ++ [ db gdbm ncurses sqlite readline ]
     ++ optionals x11Support [ tcl tk xlibsWrapper libX11 ]
-    ++ optionals stdenv.isDarwin [ CF configd ];
+    ++ optionals stdenv.isDarwin ([ CF ] ++ optional (configd != null) configd);
 
   mkPaths = paths: {
     C_INCLUDE_PATH = makeSearchPathOutput "dev" "include" paths;