slack 0 -> 1
attrpath: slack
Checking auto update branch...
[version] 
[version] generic version rewriter does not support multiple hashes
[rustCrateVersion] 
[rustCrateVersion] No cargoSha256 or cargoHash found
[golangModuleVersion] 
[golangModuleVersion] Not a buildGoModule package with vendorSha256 or vendorHash
[npmDepsVersion] 
[npmDepsVersion] No npmDepsHash
[updateScript] 
[updateScript] Success
[updateScript] this derivation will be built:
  /nix/store/fkn4ckdfp3b5g76ci8rxzq946cqwsq6b-packages.json.drv
building '/nix/store/fkn4ckdfp3b5g76ci8rxzq946cqwsq6b-packages.json.drv'...

Going to be running update for following packages:
 - slack-4.36.140

Press Enter key to continue...
Running update for:
 - slack-4.36.140: UPDATING ...
 - slack-4.36.140: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/applications/networking/instant-messengers/slack/default.nix b/pkgs/applications/networking/instant-messengers/slack/default.nix
index b19d1f6f8a01..bfb7d3787ca8 100644
--- a/pkgs/applications/networking/instant-messengers/slack/default.nix
+++ b/pkgs/applications/networking/instant-messengers/slack/default.nix
@@ -45,14 +45,14 @@ let
 
   pname = "slack";
 
-  x86_64-darwin-version = "4.36.140";
-  x86_64-darwin-sha256 = "0w1fxza3aglh7513znv190gsha12rk7k1ybdp4ml2pffwmm8diad";
+  x86_64-darwin-version = "4.37.94";
+  x86_64-darwin-sha256 = "01v7v977fq8mfsl0lipdc7ig55p2sknxzr1jmh8qxiq4f4y0rj5g";
 
   x86_64-linux-version = "4.36.140";
   x86_64-linux-sha256 = "0zahhhpcb1dxdhfmam32iqr5w3pspzbmcdv53ciqfnbkmwzkc3xr";
 
-  aarch64-darwin-version = "4.36.140";
-  aarch64-darwin-sha256 = "118mzkpk431dcm61gkbj5m4sdxkwnk6fvmxg9f96xiv6n22n7pnx";
+  aarch64-darwin-version = "4.37.94";
+  aarch64-darwin-sha256 = "0gh45gvlbjzxh0fn24z15glxqih5lggam8w6kpawsxgivkw6rjcc";
 
   version = {
     x86_64-darwin = x86_64-darwin-version;

Package version did not change.