diff --git a/build/base.sh b/build/base.sh
index 428961e..caacd53 100644
--- a/build/base.sh
+++ b/build/base.sh
@@ -29,7 +29,7 @@ set -e
 
 . ./common.sh && $(${SCRUB_ARGS})
 
-./clean.sh base
+sh ./clean.sh base
 
 git_clear ${SRCDIR}
 git_describe ${SRCDIR}
diff --git a/build/kernel.sh b/build/kernel.sh
index eb85843..5630505 100644
--- a/build/kernel.sh
+++ b/build/kernel.sh
@@ -29,7 +29,7 @@ set -e
 
 . ./common.sh && $(${SCRUB_ARGS})
 
-./clean.sh kernel
+sh ./clean.sh kernel
 
 git_clear ${SRCDIR}
 git_describe ${SRCDIR}