From 3dced96741816db01f9990e0884224d38ee58390 Mon Sep 17 00:00:00 2001
From: piegames <git@piegames.de>
Date: Wed, 10 Jul 2024 09:23:00 +0200
Subject: [PATCH] devShell: Fix errors with environment variables

Previous code assumed that $MANPATH always exists

Change-Id: I5a4d012045ba6ff9086373b3f46a75d82285d393
---
 package.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/package.nix b/package.nix
index f70cbb3b1..d62e1e719 100644
--- a/package.nix
+++ b/package.nix
@@ -493,9 +493,9 @@ stdenv.mkDerivation (finalAttrs: {
                 return
               fi
 
-              PATH=$prefix/bin:$PATH
+              PATH=$prefix/bin''${PATH:+:''${PATH}}
               unset PYTHONPATH
-              export MANPATH=$out/share/man:$MANPATH
+              export MANPATH=$out/share/man''${MANPATH:+:''${MANPATH}}
 
               # Make bash completion work.
               XDG_DATA_DIRS+=:$out/share