diff --git a/.github/workflows/ci_regressions.yml b/.github/workflows/ci_regressions.yml
deleted file mode 100644
index a6d7bfb4706122..00000000000000
--- a/.github/workflows/ci_regressions.yml
+++ /dev/null
@@ -1,103 +0,0 @@
-name: Windows CI regressions
-
-on:
-  pull_request:
-    paths:
-      - '.github/workflows/ci_regressions.yml'
-      - '.github/actions/setup-v/**'
-      - '.github/workflows/prepare_v.ps1'
-      - '.github/workflows/prepare_v.sh'
-      - '.github/workflows/setup_windows_tool_cache.ps1'
-      - 'makev.bat'
-      - 'cmd/v/**'
-      - 'vlib/v/driver/**'
-      - 'vlib/v/gen/c/**'
-      - 'vlib/v/transform/**'
-      - 'vlib/v/compiler_tests/checker_assignment_review_test.v'
-      - 'vlib/v/tests/generics/generic_callback_field_payload_test.v'
-      - 'vlib/net/**'
-      - 'vlib/sync/**'
-      - 'thirdparty/mbedtls/**'
-  workflow_dispatch:
-
-concurrency:
-  group: windows-ci-regressions-${{ github.ref }}
-  cancel-in-progress: true
-
-permissions:
-  contents: read
-
-jobs:
-  windows-regressions:
-    # Match the native toolchains used by the full Windows TCC and MSVC lanes.
-    runs-on: windows-2022
-    timeout-minutes: 45
-    defaults:
-      run:
-        shell: pwsh
-    env:
-      VJOBS: '2'
-      VTEST_FAIL_FAST: '1'
-      V_MACOS_V3_NO_FALLBACK: '1'
-    steps:
-      - uses: actions/checkout@v7
-        timeout-minutes: 3
-        with:
-          persist-credentials: false
-      - name: Prepare private tool cache
-        timeout-minutes: 2
-        run: .\.github\workflows\setup_windows_tool_cache.ps1
-      - name: Initialize MSVC tools
-        uses: ilammy/msvc-dev-cmd@0b201ec74fa43914dc39ae48a89fd1d8cb592756 # v1.13.0
-        timeout-minutes: 3
-        with:
-          arch: x64
-      - name: Build the optimized V compiler
-        id: build
-        uses: ./.github/actions/setup-v
-        timeout-minutes: 15
-        with:
-          use-prebuilt: 'false'
-          symlink: 'false'
-      - name: Check generic callback payloads with TCC
-        if: ${{ !cancelled() && steps.build.outcome == 'success' }}
-        timeout-minutes: 3
-        env:
-          VFLAGS: -cc tcc -no-retry-compilation
-        run: |
-          .\v.exe -stats vlib/v/tests/generics/generic_callback_field_payload_test.v
-          if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
-      - name: Check generic callback payloads with MSVC
-        if: ${{ !cancelled() && steps.build.outcome == 'success' }}
-        timeout-minutes: 3
-        env:
-          VFLAGS: -cc msvc -no-retry-compilation
-        run: |
-          .\v.exe -stats vlib/v/tests/generics/generic_callback_field_payload_test.v
-          if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
-      - name: Check nested checker compiler lifetimes with TCC
-        if: ${{ !cancelled() && steps.build.outcome == 'success' }}
-        timeout-minutes: 10
-        env:
-          VFLAGS: -cc tcc -no-retry-compilation
-        run: |
-          .\v.exe -stats vlib/v/compiler_tests/checker_assignment_review_test.v
-          if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
-      - name: Check tool cache manifest staging with MSVC
-        if: ${{ !cancelled() && steps.build.outcome == 'success' }}
-        timeout-minutes: 8
-        env:
-          VFLAGS: -cc msvc -no-retry-compilation
-        run: |
-          .\v.exe -stats cmd/v/toolcache_test.v
-          if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
-      - name: Check HTTP/2 transport with TCC
-        if: ${{ !cancelled() && steps.build.outcome == 'success' }}
-        timeout-minutes: 5
-        env:
-          VFLAGS: -cc tcc -no-retry-compilation
-        # -stats reports completed functions. Trace entries flush to stderr so
-        # a timeout also identifies the function that has not returned.
-        run: |
-          .\v.exe -stats -trace-calls -trace-fns 'test_*' vlib/net/http/transport_h2_test.v
-          if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
diff --git a/cmd/v/toolcache_test.v b/cmd/v/toolcache_test.v
index 6636e9c678c44f..2367d6a7db0824 100644
--- a/cmd/v/toolcache_test.v
+++ b/cmd/v/toolcache_test.v
@@ -152,7 +152,7 @@ fn toolcache_test_dir(name string) string {
 	$if windows {
 		// The MSVC probe is not longPathAware. Leave room for a complete cache
 		// key, staging directory, executable name, and application manifest.
-		directory = os.join_path(os.temp_dir(), 'vtc_${os.getpid()}_${name}')
+		directory = os.join_path(os.vtmp_dir(), 'vtc_${os.getpid()}_${name}')
 	}
 	os.rmdir_all(directory) or {}
 	os.mkdir_all(directory) or { panic(err) }