Deduplicate workadventure sources

Maximal sharing means that even if the workadventure sources are imported
in all nix files, there will still only be one copy of it in the nix store
--- nevertheless, it seems reasonable to only have them once in the code,
too, if only to make upgrading them easier.

1 files changed, 3 insertions, 8 deletions

diff --git a/back/default.nix b/back/default.nix
index 525253e..f74936a 100644
--- a/back/default.nix
+++ b/back/default.nix
@@ -1,6 +1,7 @@
+workadventuresrc:
+
 { stdenv
 , autoPatchelfHook
-, fetchFromGitHub
 , fetchzip
 , makeWrapper
 , nodejs-14_x
@@ -36,13 +37,7 @@ yarn2nix-moretea.mkYarnPackage rec {
   pname = "workadventureback";
   version = "unstable";
 
-  src = fetchFromGitHub
-    {
-      owner = "thecodingmachine";
-      repo = "workadventure";
-      rev = "6e9c71598004dc9cbab9418efb3c0ac892da7ca2";
-      sha256 = "0rvra0dy631al4aylacyqldkyd6biawz2shsikgcy30nv5lzc78c";
-    } + "/back";
+  src = "${workadventuresrc}/back";
 
   # NOTE: this is optional and generated dynamically if omitted
   yarnNix = ./yarn.nix;