diff --git a/pkgs/applications/office/gtg/default.nix b/pkgs/applications/office/gtg/default.nix
index 4c892b2605bb..3b7052dff7f3 100644
--- a/pkgs/applications/office/gtg/default.nix
+++ b/pkgs/applications/office/gtg/default.nix
@@ -16,13 +16,13 @@
 
 python3Packages.buildPythonApplication rec {
   pname = "gtg";
-  version = "unstable-2020-10-22";
+  version = "0.5";
 
   src = fetchFromGitHub {
     owner = "getting-things-gnome";
     repo = "gtg";
-    rev = "144814c16723fa9d00e17e047df5d79ab443fc5f";
-    sha256 = "1lpanfbj8y8b6cqp92lgbvfs8irrc5bsdffzcjcycazv19qm7z2n";
+    rev = "v${version}";
+    sha256 = "0b2slm7kjq6q8c7v4m7aqc8m1ynjxn3bl7445srpv1xc0dilq403";
   };
 
 
@@ -56,6 +56,10 @@ python3Packages.buildPythonApplication rec {
     xvfb_run
   ];
 
+  preBuild = ''
+    export HOME="$TMP"
+  '';
+
   format = "other";
   strictDeps = false; # gobject-introspection does not run with strictDeps (https://github.com/NixOS/nixpkgs/issues/56943)