nasm 0 -> 1
attrpath: nasm
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
[npmDepsVersion] 
[npmDepsVersion] No npmDepsHash
[updateScript] 
[updateScript] Success
[updateScript] this derivation will be built:
  /nix/store/8cz6mqh0g48ggrb7g6qwf934xdbrzzn2-packages.json.drv
building '/nix/store/8cz6mqh0g48ggrb7g6qwf934xdbrzzn2-packages.json.drv'...

Going to be running update for following packages:
 - nasm-2.16.02

Press Enter key to continue...
Running update for:
 - nasm-2.16.02: UPDATING ...
 - nasm-2.16.02: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/development/compilers/nasm/default.nix b/pkgs/development/compilers/nasm/default.nix
index 64abd3a1e322..a55c51f6e488 100644
--- a/pkgs/development/compilers/nasm/default.nix
+++ b/pkgs/development/compilers/nasm/default.nix
@@ -7,11 +7,11 @@
 
 stdenv.mkDerivation rec {
   pname = "nasm";
-  version = "2.16.02";
+  version = "2.16.03";
 
   src = fetchurl {
     url = "https://www.nasm.us/pub/nasm/releasebuilds/${version}/${pname}-${version}.tar.xz";
-    sha256 = "sha256-HhuULqiPIu2uiWWeFb4m+gJ+rgdH9RQTVA9S1OrEeQ0=";
+    sha256 = "sha256-FBKhx2C70F2wJrbA0WV6/9ZjHNCmPN229zzG1KphYUg=";
   };
 
   nativeBuildInputs = [ perl ];

No auto update branch exists
There might already be an open PR for this update:
- nasm: 2.16.02 -> 2.16.03
  URL "https://api.github.com/repos/NixOS/nixpkgs/issues/305142"