diff --git a/scripts/build_p2pd.sh b/scripts/build_p2pd.sh
index cf90a34..523c18e 100755
--- a/scripts/build_p2pd.sh
+++ b/scripts/build_p2pd.sh
@@ -10,7 +10,8 @@
 set -e
 
 CACHE_DIR="$1" # optional parameter pointing to a CI cache dir.
-LIBP2P_COMMIT="v0.2.1" # tags work too
+LIBP2P_COMMIT="v0.2.1" # tags work too, only used in nim-libp2p CI for now
+[[ -n "$2" ]] && LIBP2P_COMMIT="$2" # allow overriding it on the command line
 SUBREPO_DIR="vendor/go/src/github.com/libp2p/go-libp2p-daemon"
 if [[ ! -e "$SUBREPO_DIR" ]]; then
 	# we're probably in nim-libp2p's CI