Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: cxx-rs 1.0.194 -> 1.0.195 https://github.com/dtolnay/cxx/releases
attrpath: cxx-rs
Checking auto update branch...
No auto update branch exists
[version] 
[version] updated version and sha256
[rustCrateVersion] 
[rustCrateVersion] No cargoHash found
[golangModuleVersion] 
[golangModuleVersion] Not a buildGoModule package with vendorHash
[npmDepsVersion] 
[npmDepsVersion] No npmDepsHash
[updateScript] 
[updateScript] skipping because derivation has no updateScript
Diff after rewrites:
diff --git a/pkgs/by-name/cx/cxx-rs/package.nix b/pkgs/by-name/cx/cxx-rs/package.nix
index 2387f706e8e2..c77df3c9d039 100644
--- a/pkgs/by-name/cx/cxx-rs/package.nix
+++ b/pkgs/by-name/cx/cxx-rs/package.nix
@@ -8,13 +8,13 @@
 
 rustPlatform.buildRustPackage (finalAttrs: {
   pname = "cxx-rs";
-  version = "1.0.194";
+  version = "1.0.195";
 
   src = fetchFromGitHub {
     owner = "dtolnay";
     repo = "cxx";
     tag = finalAttrs.version;
-    sha256 = "sha256-PIeF9VuyJOIs1x02YETKIP0+nCG3RZXLMJdFNlgAFzo=";
+    sha256 = "sha256-1rsefhyVGi1fBxG7vt4BwBNIA5qgY5u0DJQOkqpvJjQ=";
   };
 
   cargoLock.lockFile = ./Cargo.lock;

Received ExitFailure 1 when running
Raw command: nix-build --option sandbox true --arg config "{ allowUnfree = true; allowAliases = false; }" --arg overlays "[ ]" -A cxx-rs
nix build failed.
got build log for 'cxx-rs' from 'daemon'
Running phase: unpackPhase
@nix { "action": "setPhase", "phase": "unpackPhase" }
unpacking source archive /nix/store/rqahpf94mcaqhypa58wncal0adb4mcbl-source
source root is source
Executing cargoSetupPostUnpackHook
Finished cargoSetupPostUnpackHook
Running phase: patchPhase
@nix { "action": "setPhase", "phase": "patchPhase" }
Executing cargoSetupPostPatchHook
Validating consistency between /build/source/Cargo.lock and /build/cargo-vendor-dir/Cargo.lock
Finished cargoSetupPostPatchHook
Running phase: updateAutotoolsGnuConfigScriptsPhase
@nix { "action": "setPhase", "phase": "updateAutotoolsGnuConfigScriptsPhase" }
Running phase: configurePhase
@nix { "action": "setPhase", "phase": "configurePhase" }
Running phase: buildPhase
@nix { "action": "setPhase", "phase": "buildPhase" }
Executing cargoBuildHook
cargoBuildHook flags: -j 16 --target x86_64-unknown-linux-gnu --offline --profile release --workspace --exclude=demo
error: failed to write /build/source/Cargo.lock

Caused by:
  failed to open: /build/source/Cargo.lock

Caused by:
  Permission denied (os error 13)