diff --git a/.github/workflows/http3-linux.yml b/.github/workflows/http3-linux.yml
index 950a0f0194..2b26fdbbe3 100644
--- a/.github/workflows/http3-linux.yml
+++ b/.github/workflows/http3-linux.yml
@@ -467,6 +467,12 @@ jobs:
           MATRIX_GENERATE: '${{ matrix.build.generate }}'
           MATRIX_PKG_CONFIG_PATH: '${{ matrix.build.PKG_CONFIG_PATH }}'
         run: |
+          ls -lA /home/runner/gnutls/build/lib/pkgconfig  || true
+          ls -lA /home/runner/nghttp3/build/lib/pkgconfig || true
+          ls -lA /home/runner/ngtcp2/build/lib/pkgconfig  || true
+          ls -lA /home/runner/nghttp2/build/lib/pkgconfig || true
+          /usr/bin/pkg-config --exists      libngtcp2_crypto_gnutls
+          /usr/bin/pkg-config --libs-only-l libngtcp2_crypto_gnutls
           [ -n "${MATRIX_PKG_CONFIG_PATH}" ] && export PKG_CONFIG_PATH="${MATRIX_PKG_CONFIG_PATH}"
           if [ "${MATRIX_BUILD}" = 'cmake' ]; then
             cmake -B bld -G Ninja \