diff --git a/ci/iscc b/ci/iscc
index bcd6e88d67..5037668f26 100755
--- a/ci/iscc
+++ b/ci/iscc
@@ -37,8 +37,7 @@ WORKDIR /work
 ENTRYPOINT ["iscc"]
 __EOF__
 
-CMD="$(type -p docker)" || [[ -e $CMD ]] && $CMD info >/dev/null 2>&1 || CMD="$(type -p nerdctl)"
-$CMD info > /dev/null || false
+CMD="$(type -p docker)" && $CMD info >/dev/null 2>&1 || CMD="$(type -p nerdctl)" && $CMD info > /dev/null || false
 echo Select container CLI: $CMD
 
 IMAGEID=$($CMD images -q $IMAGE)
diff --git a/ci/osslsigncode b/ci/osslsigncode
index 704e641b6c..4efd895895 100755
--- a/ci/osslsigncode
+++ b/ci/osslsigncode
@@ -15,9 +15,8 @@ bindpaths() {
     done
 }
 
-CMD="$(type -p docker)" || [[ -e $CMD ]] && $CMD info >/dev/null 2>1 || CMD="$(type -p nerdctl)"
-echo select container CLI: $CMD
-$CMD info || false
+CMD="$(type -p docker)" && $CMD info >/dev/null 2>1 || CMD="$(type -p nerdctl)" && $CMD info >/dev/null || false
+echo Select container CLI: $CMD
 
 # build container image
 CTX=$(mktemp -d)