Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: cgtcalc 0 -> 1
attrpath: cgtcalc
Checking auto update branch...
[version] 
[version] skipping because derivation has updateScript
[rustCrateVersion] 
[rustCrateVersion] No cargoHash found
[golangModuleVersion] 
[golangModuleVersion] Not a buildGoModule package with vendorHash
[npmDepsVersion] 
[npmDepsVersion] No npmDepsHash
[updateScript] 
[updateScript] Success
[updateScript] this derivation will be built:
  /nix/store/z5q6k9n86rlnzxhk74n4whmixp1097n4-packages.json.drv
building '/nix/store/z5q6k9n86rlnzxhk74n4whmixp1097n4-packages.json.drv'...

Going to be running update for following packages:
 - cgtcalc-0-unstable-2025-10-11

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - cgtcalc-0-unstable-2025-10-11: UPDATING ...
 - cgtcalc-0-unstable-2025-10-11: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/by-name/cg/cgtcalc/package.nix b/pkgs/by-name/cg/cgtcalc/package.nix
index c3720fb38c9e..b7264c7cfafc 100644
--- a/pkgs/by-name/cg/cgtcalc/package.nix
+++ b/pkgs/by-name/cg/cgtcalc/package.nix
@@ -13,15 +13,15 @@ let
 in
 stdenv.mkDerivation (finalAttrs: {
   pname = "cgtcalc";
-  version = "0-unstable-2025-10-11";
+  version = "0.1.0-unstable-2026-04-03";
 
   src = fetchFromGitHub {
     owner = "mattjgalloway";
     repo = "cgtcalc";
     # Repo has no tags or releases.
     # This is the last commit before requiring Swift 6
-    rev = "1cf63741ddc0a5070680cb1339ad0abff0b7d69b";
-    hash = "sha256-+qgvl5y9ipVQIZlLZbkzkqb9bO7X9VGDvVsloOLZU/k=";
+    rev = "01b35ea37358eda65e370fbb93f253f42da21082";
+    hash = "sha256-aukQIWZaQP+sNfAfZNVeYBa8mzwxDhcwoASWwLEz+BY=";
   };
   nativeBuildInputs = [
     swift

No auto update branch exists
Received ExitFailure 1 when running
Raw command: nix-build --option sandbox true --arg config "{ allowUnfree = true; allowAliases = false; }" --arg overlays "[ ]" -A cgtcalc
nix build failed.
got build log for 'cgtcalc' from 'daemon'
Running phase: unpackPhase
@nix { "action": "setPhase", "phase": "unpackPhase" }
unpacking source archive /nix/store/gdbnamy0bqs7ywnwwk40a3a1hy7zymzl-source
source root is source
Running phase: patchPhase
@nix { "action": "setPhase", "phase": "patchPhase" }
Running phase: updateAutotoolsGnuConfigScriptsPhase
@nix { "action": "setPhase", "phase": "updateAutotoolsGnuConfigScriptsPhase" }
Running phase: configurePhase
@nix { "action": "setPhase", "phase": "configurePhase" }
Running phase: buildPhase
@nix { "action": "setPhase", "phase": "buildPhase" }
build flags: -j 16 -c release
warning: /homeless-shelter/.cache/org.swift.swiftpm is not accessible or not writable, disabling user-level cache features.
error: 'source': package 'source' is using Swift tools version 6.0.0 but the installed version is 5.10.1