diff --git a/Dockerfile b/Dockerfile
index ba475ca..42fb05e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,6 +6,6 @@ RUN useradd -m user && \
 
 USER user
 WORKDIR /workspace
-ENV PYTHONPATH="${PYTHONPATH}:/home/user/.local/bin"
+ENV PYTHONPATH="/home/user/.local/bin"
 ENV PATH="${PATH}:/home/user/.local/bin"
 RUN pip install --no-cache-dir -r /tmp/build-requirements.txt
diff --git a/build-requirements.txt b/build-requirements.txt
index 8593ff6..986790d 100644
--- a/build-requirements.txt
+++ b/build-requirements.txt
@@ -1,4 +1,5 @@
 build
 pytest
 twine
-flake8
\ No newline at end of file
+flake8
+pipreqs
\ No newline at end of file