diff --git a/themes/modify_slick.sh b/themes/modify_slick.sh
index d83cd02..d7425c2 100755
--- a/themes/modify_slick.sh
+++ b/themes/modify_slick.sh
@@ -1,6 +1,12 @@
 #!/bin/sh
 
-pushd /home/tastytea/blog/themes
+if [ "$(basename ${PWD})" != "themes" ]; then
+    echo "cd to theme directory, please." >&2
+    exit 1
+fi
+
+mkdir -p tastytea/static/assets
+
 for file in style.css style-compat.css; do
     cp slick/static/assets/${file} tastytea/static/assets/${file}
 
@@ -32,4 +38,3 @@ for file in style.css style-compat.css; do
 
     sed -i 's/#000/#e2e0de/g' tastytea/static/assets/${file}    # Some links
 done
-popd