diff --git a/.github/workflows/coin-matrix.yml b/.github/workflows/coin-matrix.yml
index 8dcb3c944..d56942164 100644
--- a/.github/workflows/coin-matrix.yml
+++ b/.github/workflows/coin-matrix.yml
@@ -31,7 +31,7 @@ jobs:
       - name: Check source presence
         id: presence
         run: |
-          if [ -f "src/c2pool/main_${{ matrix.coin }}.cpp" ] && [ -d "src/impl/${{ matrix.coin }}" ]; then
+          if [ -f "src/impl/${{ matrix.coin }}/main_${{ matrix.coin }}.cpp" ] && [ -d "src/impl/${{ matrix.coin }}" ]; then
             echo "exists=1" >> "$GITHUB_OUTPUT"
             echo "::notice::c2pool-${{ matrix.coin }} source present — building."
           else