From b7e695461e63a451f65095bc2e9ceffd553827d1 Mon Sep 17 00:00:00 2001
From: wucke13 <wucke13@gmail.com>
Date: Sat, 25 Aug 2018 00:39:58 +0200
Subject: [PATCH] apmplanner2: fixed wrong path in .desktop file

The `apmplanner2.desktop` file defaults to `/usr/share/...` regardless which out
prefix is given to make. So I chose to fix it manually.
---
 .../applications/science/robotics/apmplanner2/default.nix | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/pkgs/applications/science/robotics/apmplanner2/default.nix b/pkgs/applications/science/robotics/apmplanner2/default.nix
index 7ae44418fff6..2d579a803698 100644
--- a/pkgs/applications/science/robotics/apmplanner2/default.nix
+++ b/pkgs/applications/science/robotics/apmplanner2/default.nix
@@ -23,8 +23,12 @@ stdenv.mkDerivation rec {
   qmakeFlags = [ "apm_planner.pro" ];
 
   # this ugly hack is necessary, as `bin/apmplanner2` needs the contents of `share/APMPlanner2` inside of `bin/`
-  preFixup = "ln --relative --symbolic $out/share/APMPlanner2/* $out/bin/";
-
+  preFixup = ''
+    ln --relative --symbolic $out/share/APMPlanner2/* $out/bin/
+    substituteInPlace $out/share/applications/apmplanner2.desktop \
+                      --replace /usr $out
+  '';
+  
   enableParallelBuilding = true;
 
   meta = {