From 736169d01dd05e50b8a70212a28c9e7f61249348 Mon Sep 17 00:00:00 2001
From: Frederik Rietdijk <fridh@fridh.nl>
Date: Tue, 6 Dec 2016 16:36:06 +0100
Subject: [PATCH] buildPythonPackage: yet another fix, fixes #20943

I didn't copy the old behaviour correctly with
c1d98d959b38df00a1d933a5a9a381aa80096024
---
 .../interpreters/python/build-python-package-common.nix       | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/interpreters/python/build-python-package-common.nix b/pkgs/development/interpreters/python/build-python-package-common.nix
index 63936a00b39..381606acd8b 100644
--- a/pkgs/development/interpreters/python/build-python-package-common.nix
+++ b/pkgs/development/interpreters/python/build-python-package-common.nix
@@ -12,7 +12,7 @@
 attrs // {
   buildInputs = buildInputs ++ [ bootstrapped-pip ];
 
-  configurePhase = ''
+  configurePhase = attrs.configurePhase or ''
     runHook preConfigure
     runHook postConfigure
   '';
@@ -29,4 +29,4 @@ attrs // {
 
     runHook postInstall
   '';
-}
\ No newline at end of file
+}