diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
index 7e059c6..85a0982 100644
--- a/.gitea/workflows/build.yml
+++ b/.gitea/workflows/build.yml
@@ -18,7 +18,11 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version: ${{ env.GO_VERSION }}
-          cache-dependency-path: go.sum
+          # setup-go caches by default, and this runner's built-in cache server
+          # is unreachable from job containers -- every restore and save hangs
+          # until it times out, which cost 634s of a 946s build. Re-enable once
+          # act_runner's cache.host points somewhere job containers can route.
+          cache: false
 
       - name: Format
         run: test -z "$(gofmt -l .)" || { gofmt -l .; echo "run gofmt -w ."; exit 1; }
diff --git a/.gitea/workflows/release.yml b/.gitea/workflows/release.yml
index f36aa4d..565db2e 100644
--- a/.gitea/workflows/release.yml
+++ b/.gitea/workflows/release.yml
@@ -17,6 +17,9 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version: "1.25.x"
+          # See build.yml: the runner's cache server is unreachable from job
+          # containers, so caching costs minutes of timeouts instead of saving.
+          cache: false
 
       - uses: goreleaser/goreleaser-action@v6
         with: