Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: dart 0 -> 1
attrpath: dart
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] these 2 derivations will be built:
  /nix/store/qbhyrpba3ljkj84mxqj3gzg7i1010mwp-update-dart.drv
  /nix/store/bzicf1zbabinbfqjwimhicmzxk0hxhgz-packages.json.drv
building '/nix/store/qbhyrpba3ljkj84mxqj3gzg7i1010mwp-update-dart.drv'...
building '/nix/store/bzicf1zbabinbfqjwimhicmzxk0hxhgz-packages.json.drv'...

Going to be running update for following packages:
 - dart-3.11.4

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - dart-3.11.4: UPDATING ...
 - dart-3.11.4: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/development/compilers/dart/source/default.nix b/pkgs/development/compilers/dart/source/default.nix
index 3637ad19e52c..19e4d8db37a0 100644
--- a/pkgs/development/compilers/dart/source/default.nix
+++ b/pkgs/development/compilers/dart/source/default.nix
@@ -28,7 +28,7 @@
 }:
 
 let
-  version = "3.11.4";
+  version = "3.12.2";
 
   tools = callPackage ../../flutter/engine/tools.nix { inherit (stdenv) hostPlatform buildPlatform; };
 
@@ -80,7 +80,7 @@ let
 
         outputHashAlgo = "sha256";
         outputHashMode = "recursive";
-        outputHash = "sha256-y2F+wB0M5dq6koxGpCs9BExGU7p8tFOIiRqfdf8ip+8=";
+        outputHash = "sha256-J+qlj0sSWYqqvMiTP6hZYD97ho2VsrqRynCaiSRQV6Q=";
       }
       ''
         mkdir source

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 dart
nix build failed.
hint: Using 'master' as the name for the initial branch. This default branch name
hint: will change to "main" in Git 3.0. To configure the initial branch name
hint: to use in all of your new repositories, which will suppress this warning,
hint: call:
hint:
hint: 	git config --global init.defaultBranch <name>
hint:
hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
hint: 'development'. The just-created branch can be renamed via this command:
hint:
hint: 	git branch -m <name>
hint:
hint: Disable this message with "git config set advice.defaultBranchName false"
Initialized empty Git repository in /build/dart-source-deps/.git/
patchPhase completed in 30 seconds
Running phase: updateAutotoolsGnuConfigScriptsPhase
@nix { "action": "setPhase", "phase": "updateAutotoolsGnuConfigScriptsPhase" }
Running phase: configurePhase
@nix { "action": "setPhase", "phase": "configurePhase" }
no configure script, doing nothing
Running phase: buildPhase
@nix { "action": "setPhase", "phase": "buildPhase" }
ERROR at //build/config/compiler/BUILD.gn:160:9: Unexpected token ','
        ,
        ^
Command failed: /build/dart-source-deps/buildtools/gn gen out/ReleaseX64 --args=target_os="linux" host_cpu="x64" target_cpu="x64" dart_target_arch="x64" dart_use_compressed_pointers=false dart_use_crashpad=false dart_snapshot_kind="app-jit" dart_use_fallback_root_certificates=true is_debug=false is_release=true is_product=false dart_debug=false dart_runtime_mode="develop" exclude_kernel_service=false is_clang=false dart_vm_code_coverage=false dart_dynamic_modules=false is_asan=false is_lsan=false is_msan=false is_tsan=false is_ubsan=false is_hwasan=false is_qemu=false dart_platform_sdk=false dart_stripped_binary="exe.stripped/dart" dartvm_stripped_binary="exe.stripped/dartvm" dart_aotruntime_stripped_binary="exe.stripped/dartaotruntime_product" gen_snapshot_stripped_binary="exe.stripped/gen_snapshot_product" analyze_snapshot_binary="exe.stripped/analyze_snapshot" wasm_opt_stripped_binary="exe.stripped/wasm-opt" use_rbe=false verify_sdk_hash=false dart_version_git_info=true x64_toolchain_prefix="/nix/store/vdaz6sk455r8sbpi7wzaf9vlz5i9yyvx-gcc-wrapper-15.2.0/bin/" dart_embed_icu_data=false dart_snapshot_kind="app-jit" dart_sysroot=""
buildtools/ninja/ninja -C out/ReleaseX64 create_sdk runtime
ninja: entering directory 'out/ReleaseX64'
ninja: open build.ninja: No such file or directory
BUILD FAILED