diff --git a/.drone.yml b/.drone.yml
index 4bfea09..627769b 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -22,7 +22,8 @@ steps:
     image: node
     commands:
       - export version=`node -p "require('./package.json').version"`
-      - npm version prerelease --preid=`$DRONE_COMMIT | cut -c1-5` --git-tag-version=false --allow-same-version=true
+      - export commit=`echo $DRONE_COMMIT | cut -c1-5`
+      - npm version prerelease --preid=commit --git-tag-version=false --allow-same-version=true
     when:
       event:
         exclude: