diff --git a/util/check_package_config.py b/util/check_package_config.py
index 2ebc54600..2f58f3f38 100755
--- a/util/check_package_config.py
+++ b/util/check_package_config.py
@@ -21,6 +21,10 @@
 
 SPACK_ROOT = os.getenv("SPACK_ROOT")
 assert SPACK_ROOT, "$SPACK_ROOT must be set but is not!"
+print(SPACK_ROOT)
+print(os.listdir(SPACK_ROOT))
+print(os.listdir(os.path.join(SPACK_ROOT, "lib/spack/external/_vendoring")))
+
 sys.path.append(os.path.join(SPACK_ROOT, "lib/spack/external/_vendoring"))
 from ruamel import yaml
 
diff --git a/util/util_tests.sh b/util/util_tests.sh
index 609a1fcdf..e4f507052 100755
--- a/util/util_tests.sh
+++ b/util/util_tests.sh
@@ -80,6 +80,7 @@ fi
 
 ## Check check_package_config.py
 export SPACK_ENV=${SPACK_STACK_DIR}/util/test_env
+export SPACK_ROOT=${SPACK_STACK_DIR}/spack
 output_checksum=$(${SPACK_STACK_DIR}/util/check_package_config.py | sort | md5sum)
 reference_checksum=$(cat ${SPACK_STACK_DIR}/util/test_env/package_check_baseline.txt | md5sum)
 if [[ "$output_checksum" != "$reference_checksum" ]]; then