diff --git a/.gitea/workflows/.check.yaml.swp b/.gitea/workflows/.check.yaml.swp
new file mode 100644
index 0000000..c39eff5
Binary files /dev/null and b/.gitea/workflows/.check.yaml.swp differ
diff --git a/.gitea/workflows/check.yaml b/.gitea/workflows/check.yaml
index e92ae4e..5316fb7 100644
--- a/.gitea/workflows/check.yaml
+++ b/.gitea/workflows/check.yaml
@@ -6,7 +6,7 @@ on:
 
 jobs:
   # Runs on the existing Linux runners. Wakeful links AppKit, IOKit and Carbon,
-  # so this can parse the Swift but not compile it; see the macos job below.
+  # so this can parse the Swift but not compile it; see macos.yaml.
   lint:
     runs-on: ubuntu-latest
     container:
@@ -27,22 +27,3 @@ jobs:
 
       - name: Check
         run: scripts/check.sh
-
-  # A real build. Off until a macOS act_runner with the "macos" label is
-  # registered; then set the repo variable MACOS_RUNNER=true to enable it.
-  macos:
-    if: vars.MACOS_RUNNER == 'true'
-    runs-on: macos
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Check
-        run: scripts/check.sh
-
-      - name: Build (warnings are errors)
-        run: swift build -c release -Xswiftc -warnings-as-errors
-
-      - name: Bundle and ad-hoc sign
-        run: |
-          make bundle
-          plutil -lint dist/Wakeful.app/Contents/Info.plist
diff --git a/.gitea/workflows/macos.yaml b/.gitea/workflows/macos.yaml
new file mode 100644
index 0000000..3f73056
--- /dev/null
+++ b/.gitea/workflows/macos.yaml
@@ -0,0 +1,24 @@
+name: macos
+
+# A real build. Manual-only for now: there is no macOS runner, and Gitea leaves
+# a job queued (not skipped) when no runner has its label, even behind an `if`.
+# Once an act_runner with the "macos" label is registered, add `push:` here.
+on:
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: macos
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Check
+        run: scripts/check.sh
+
+      - name: Build (warnings are errors)
+        run: swift build -c release -Xswiftc -warnings-as-errors
+
+      - name: Bundle and ad-hoc sign
+        run: |
+          make bundle
+          plutil -lint dist/Wakeful.app/Contents/Info.plist