diff --git a/.github/workflows/http3-linux.yml b/.github/workflows/http3-linux.yml
index ca6ed88b17..26d713a961 100644
--- a/.github/workflows/http3-linux.yml
+++ b/.github/workflows/http3-linux.yml
@@ -468,8 +468,11 @@ jobs:
           MATRIX_GENERATE: '${{ matrix.build.generate }}'
           MATRIX_PKG_CONFIG_PATH: '${{ matrix.build.PKG_CONFIG_PATH }}'
         run: |
-          [ -n "${MATRIX_PKG_CONFIG_PATH}" ] && export PKG_CONFIG_PATH="${MATRIX_PKG_CONFIG_PATH}:${PKG_CONFIG_PATH}"
+          [ -n "${MATRIX_PKG_CONFIG_PATH}" ] && export PKG_CONFIG_PATH="${MATRIX_PKG_CONFIG_PATH}"
           echo "|${PKG_CONFIG_PATH}|"
+          env | grep PKG || true
+          pkg-config --version
+          pkg-config --list-all
           pkg-config --debug --exists gnutls || true
           if [ "${MATRIX_BUILD}" = 'cmake' ]; then
             cmake -B bld -G Ninja \