From a76e11a8c509f2db5871aced41b46077b66206a2 Mon Sep 17 00:00:00 2001
From: Daiderd Jordan <daiderd@gmail.com>
Date: Tue, 5 Mar 2019 20:25:38 +0100
Subject: [PATCH] python: make it possible to disable the python setup-hook

Without this it's impossible to use a python binary that depends on a
different python version than what's used during the current build.
---
 pkgs/development/interpreters/python/setup-hook.sh | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/interpreters/python/setup-hook.sh b/pkgs/development/interpreters/python/setup-hook.sh
index 77ec9e9ac0bf..523df5762fad 100644
--- a/pkgs/development/interpreters/python/setup-hook.sh
+++ b/pkgs/development/interpreters/python/setup-hook.sh
@@ -12,7 +12,9 @@ toPythonPath() {
     echo $result
 }
 
-addEnvHooks "$hostOffset" addPythonPath
+if [ -z "${dontAddPythonPath:-}" ]; then
+    addEnvHooks "$hostOffset" addPythonPath
+fi
 
 # Determinism: The interpreter is patched to write null timestamps when compiling python files.
 # This way python doesn't try to update them when we freeze timestamps in nix store.