spago 0 -> 1
attrpath: spago
Checking auto update branch...
[version] 
[version] skipping because derivation has updateScript
[rustCrateVersion] 
[rustCrateVersion] No cargoSha256 or cargoHash found
[golangModuleVersion] 
[golangModuleVersion] Not a buildGoModule package with vendorSha256 or vendorHash
[updateScript] 
[updateScript] Success
[updateScript] this derivation will be built:
  /nix/store/wbl49iaa7z1y2iwx1sn0832lbykgzks1-packages.json.drv
building '/nix/store/wbl49iaa7z1y2iwx1sn0832lbykgzks1-packages.json.drv'...

Going to be running update for following packages:
 - spago-0.20.9

Press Enter key to continue...
Running update for:
 - spago-0.20.9: UPDATING ...
 - spago-0.20.9: DONE.

Packages updated!


[quotedUrls]
[quotedUrls] nothing found to replace
Diff after rewrites:
diff --git a/pkgs/development/tools/purescript/spago/spago.nix b/pkgs/development/tools/purescript/spago/spago.nix
index e3636e16f58..588e19aa09c 100644
--- a/pkgs/development/tools/purescript/spago/spago.nix
+++ b/pkgs/development/tools/purescript/spago/spago.nix
@@ -43,4 +43,5 @@ mkDerivation {
   testToolDepends = [ hspec-discover ];
   homepage = "https://github.com/purescript/spago#readme";
   license = lib.licenses.bsd3;
+  mainProgram = "spago";
 }

No auto update branch exists
Update edits cause no rebuilds.