diff --git a/.github/workflows/nightly_build.yml b/.github/workflows/nightly_build.yml
index 8937d964bd..087f379984 100644
--- a/.github/workflows/nightly_build.yml
+++ b/.github/workflows/nightly_build.yml
@@ -107,6 +107,12 @@ jobs:
           command: build
           args: --workspace --features=coconut
 
+      - 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 all tests with coconut enabled
         uses: actions-rs/cargo@v1
         with: