diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index 1d7096e..33bc193 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -28,15 +28,17 @@ jobs:
       - name: get nightly toolchain for jetstream fmt
         run: rustup toolchain install nightly --allow-downgrade -c rustfmt
       - name: fmt
-        run: >-
-          cargo fmt
-            --package constellation
-            --package links
-            --package pocket
-            --package quasar
-            --package slingshot
-            --package spacedust
-            --package ufos
+        run: |
+          cargo fmt \
+            --package constellation \
+            --package links \
+            --package pocket \
+            --package quasar \
+            --package slingshot \
+            --package spacedust \
+            --package ufos \
+            -- \
+            --check
       - name: fmt jetstream (nightly)
         run: cargo +nightly fmt --package jetstream -- --check
       - name: clippy