diff --git a/.gitea/workflows/deploy.yaml b/.gitea/workflows/deploy.yaml
index 947bc39..88ef21a 100644
--- a/.gitea/workflows/deploy.yaml
+++ b/.gitea/workflows/deploy.yaml
@@ -28,9 +28,23 @@ env:
 
 jobs:
   build:
-    # fedora-44 carries node + npm + pnpm (gitea-runners.md §4) and nothing else
-    # is needed — there is no Rust half here.
-    runs-on: fedora-44
+    # `rust`, not `fedora-44`, despite there being no Rust here.
+    #
+    # The fedora-4x images list pnpm (gitea-runners.md §4) but their pnpm cannot
+    # run: `@pnpm/exe` is a native binary and the images lack libatomic, so the
+    # very first step dies with
+    #
+    #   pnpm: error while loading shared libraries: libatomic.so.1
+    #
+    # `runner-rust` is built on `runner-fedora-44` and adds gcc, musl-gcc and
+    # cmake, which pull libatomic in as a side effect — which is why
+    # blackbeard.observer builds its SPA there and this one now does too.
+    #
+    # This is a workaround for a runner-image bug, not the fix. The fix is
+    # libatomic in the fedora-4x Containerfiles (gitea-runners.md §5: bake build
+    # dependencies into the image, not the workflow). Move back when that lands;
+    # a 4 CPU / 4 GiB image to run `vite build` is more than this needs.
+    runs-on: rust
     steps:
       - uses: actions/checkout@v4