diff --git a/Dockerfile b/Dockerfile
index 37e108d..2e4eefc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,31 +2,17 @@ FROM python:3.9-alpine
 
 ENV PYTHONUNBUFFERED 1
 
-WORKDIR "/app"
-
-RUN set -ex; \
-    pip3 install \
-        --no-cache-dir --no-color --disable-pip-version-check --no-python-version-warning \
-        pipenv \
-    ;
-
-COPY Pipfile Pipfile.lock ./
-
 RUN set -ex; \
     # install prerequisites
     apk add --no-cache \
         g++ \
         jpeg-dev \
         zlib-dev \
-    ; \
-    # build/install local packages
-    pipenv install --deploy; \
-    pipenv --clear; \
-    # remove build-only prerequisites
-    apk del --no-cache \
-        g++ \
     ;
 
-COPY . .
+COPY . /usr/src/fftcgtool
 
-ENTRYPOINT ["pipenv", "run", "./fftcgtool.py"]
+RUN set -ex; \
+    pip3 --use-feature=in-tree-build install /usr/src/fftcgtool
+
+ENTRYPOINT ["fftcgtool"]
diff --git a/setup.py b/setup.py
index 151af10..d8e8560 100644
--- a/setup.py
+++ b/setup.py
@@ -1,8 +1,9 @@
-from setuptools import setup
+from setuptools import setup, find_packages
 
 setup(
     name="fftcgtool",
     version="0.2",
+    packages=find_packages(),
     author="LDericher",
     author_email="ldericher@gmx.de",
     setup_requires="setuptools-pipfile",