diff --git a/.ci_support/linux_64_.yaml b/.ci_support/linux_64_.yaml
index d87a19b..f015649 100644
--- a/.ci_support/linux_64_.yaml
+++ b/.ci_support/linux_64_.yaml
@@ -1,7 +1,7 @@
 c_compiler:
 - gcc
 c_compiler_version:
-- '7'
+- '9'
 cdt_name:
 - cos6
 channel_sources:
diff --git a/.scripts/run_docker_build.sh b/.scripts/run_docker_build.sh
index 87ba4db..36dacd6 100755
--- a/.scripts/run_docker_build.sh
+++ b/.scripts/run_docker_build.sh
@@ -45,8 +45,12 @@ fi
 if [ -z "${DOCKER_IMAGE}" ]; then
     SHYAML_INSTALLED="$(shyaml -h || echo NO)"
     if [ "${SHYAML_INSTALLED}" == "NO" ]; then
-        echo "WARNING: DOCKER_IMAGE variable not set and shyaml not installed. Falling back to condaforge/linux-anvil-comp7"
-        DOCKER_IMAGE="condaforge/linux-anvil-comp7"
+        echo "WARNING: DOCKER_IMAGE variable not set and shyaml not installed. Trying to parse with coreutils"
+        DOCKER_IMAGE=$(cat .ci_support/${CONFIG}.yaml | grep '^docker_image:$' -A 1 | tail -n 1 | cut -b 3-)
+        if [ "${DOCKER_IMAGE}" = "" ]; then
+            echo "No docker_image entry found in ${CONFIG}. Falling back to condaforge/linux-anvil-comp7"
+            DOCKER_IMAGE="condaforge/linux-anvil-comp7"
+        fi
     else
         DOCKER_IMAGE="$(cat "${FEEDSTOCK_ROOT}/.ci_support/${CONFIG}.yaml" | shyaml get-value docker_image.0 condaforge/linux-anvil-comp7 )"
     fi
@@ -64,8 +68,8 @@ fi
 
 export UPLOAD_PACKAGES="${UPLOAD_PACKAGES:-True}"
 docker run ${DOCKER_RUN_ARGS} \
-           -v "${RECIPE_ROOT}":/home/conda/recipe_root:rw,z \
-           -v "${FEEDSTOCK_ROOT}":/home/conda/feedstock_root:rw,z \
+           -v "${RECIPE_ROOT}":/home/conda/recipe_root:rw,z,delegated \
+           -v "${FEEDSTOCK_ROOT}":/home/conda/feedstock_root:rw,z,delegated \
            -e CONFIG \
            -e HOST_USER_ID \
            -e UPLOAD_PACKAGES \