Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: folly 2026.01.19.00 -> 2026.03.16.00 https://github.com/facebook/folly/releases
attrpath: folly
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/m0y8h43kynd5gn4chcpbl84nbgvqdvvi-packages.json.drv
building '/nix/store/m0y8h43kynd5gn4chcpbl84nbgvqdvvi-packages.json.drv'...

Going to be running update for following packages:
 - folly-2026.01.19.00

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - folly-2026.01.19.00: UPDATING ...
 - folly-2026.01.19.00: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/by-name/fo/folly/package.nix b/pkgs/by-name/fo/folly/package.nix
index 9a956c41eeb0..bed696f7495c 100644
--- a/pkgs/by-name/fo/folly/package.nix
+++ b/pkgs/by-name/fo/folly/package.nix
@@ -40,7 +40,7 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "folly";
-  version = "2026.01.19.00";
+  version = "2026.03.16.00";
 
   # split outputs to reduce downstream closure sizes
   outputs = [
@@ -52,7 +52,7 @@ stdenv.mkDerivation (finalAttrs: {
     owner = "facebook";
     repo = "folly";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-gfmN/9LizPdacUd1eJxFx79I63SwqX0NaWFgbe6vbFk=";
+    hash = "sha256-LihCftvRx1F7/WQX4eb7aysV6JZCSwlk2+3IYJN/0mo=";
   };
 
   nativeBuildInputs = [

No auto update branch exists
There might already be an open PR for this update:
- watchman: 2026.01.19.00 -> 2026.03.16.00
  URL "https://api.github.com/repos/NixOS/nixpkgs/issues/499286"