From 99760ed95bc2e31cadeda9d0911a8d38d6077df8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <v@cunat.cz>
Date: Thu, 9 May 2019 09:58:35 +0200
Subject: [PATCH] pypi2nix: fix $IN_NIX_SHELL test

In nix 2.0 this changed: https://github.com/NixOS/nix/commit/1bffd83
I only kept the original intention and did no kind of verification.
---
 pkgs/development/tools/pypi2nix/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/tools/pypi2nix/default.nix b/pkgs/development/tools/pypi2nix/default.nix
index 70c292365ab..e3d458fc648 100644
--- a/pkgs/development/tools/pypi2nix/default.nix
+++ b/pkgs/development/tools/pypi2nix/default.nix
@@ -43,7 +43,7 @@ in stdenv.mkDerivation rec {
     mv click-*/click                    $out/pkgs/click
     mv requests-*/requests              $out/pkgs/
 
-    if [ "$IN_NIX_SHELL" != "1" ]; then
+    if [ -z "$IN_NIX_SHELL" ]; then
       if [ -e git-export ]; then
         mv git-export/src/pypi2nix      $out/pkgs/pypi2nix
       else