diff --git a/.github/workflows/nightly_build.yml b/.github/workflows/nightly_build.yml
index 805d04c830..fcecddfe98 100644
--- a/.github/workflows/nightly_build.yml
+++ b/.github/workflows/nightly_build.yml
@@ -50,6 +50,12 @@ jobs:
           command: test
           args: --workspace
 
+      - name: Reclaim some disk space (because Windows is being annoying)
+        uses: actions-rs/cargo@v1
+        if: ${{ matrix.os == 'windows-latest' }}
+        with:
+          command: clean
+
       - name: Run expensive tests
         if: github.ref == 'refs/heads/develop' || github.event.pull_request.base.ref == 'develop' || github.event.pull_request.base.ref == 'master'
         uses: actions-rs/cargo@v1