diff --git a/Dockerfile b/Dockerfile
index a302d93..bdb97eb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -16,14 +16,9 @@ RUN rm -rf /var/lib/apt/lists/* \
            /var/tmp/* \
            /usr/share/doc/* 
 
-RUN touch input/__init__.py \
-          output/__init__.py \
-          local/__init__.py \
-          settings/__init__.py
-
-RUN for f in settings/*.txt ; do \
-        mv $f $f{s/.txt/.py} ;\
-    done
+RUN mkdir -p input output local settings && \
+    touch input/__init__.py output/__init__.py local/__init__.py settings/__init__.py && \
+    for f in settings/*.txt ; do mv "$f" "${f%.txt}.py" ; done
 
 RUN pip install --no-cache-dir -r requirements.txt