diff --git a/.github/workflows/release-test.yml b/.github/workflows/release-test.yml
index 1a316c17..30104826 100644
--- a/.github/workflows/release-test.yml
+++ b/.github/workflows/release-test.yml
@@ -19,7 +19,8 @@ jobs:
       - name: Remove large directories
         run: |
           df -h
-          rm -rf /opt/hostedtoolcache || true
+          cd /opt/hostedtoolcache
+          find . -mindepth 1 -maxdepth 1 -type d -not -name 'go' -exec rm -rf {} +
           df -h
       - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
 
diff --git a/bpf/btfgen.sh b/bpf/btfgen.sh
index 6387ea4d..36a830a6 100755
--- a/bpf/btfgen.sh
+++ b/bpf/btfgen.sh
@@ -81,12 +81,11 @@ rsync -avz \
 
 # generate tailored BTFs
 
+[ ! -d ${BASEDIR}/bpf/custom-archive ] && mkdir -p ${BASEDIR}/bpf/custom-archive
+rm -rf ${BASEDIR}/bpf/custom-archive/* || true
+
 [ ! -f ./tools/btfgen.sh ] && die "could not find btfgen.sh"
 ./tools/btfgen.sh -a $1 -o ${KYANOS_BPF_CORE}
 
-
 # move tailored BTFs to dist
-
-[ ! -d ${BASEDIR}/bpf/custom-archive ] && mkdir -p ${BASEDIR}/bpf/custom-archive
-rm -rf ${BASEDIR}/bpf/custom-archive/* || true
 mv ./custom-archive/* ${BASEDIR}/bpf/custom-archive