diff -r 9e3ce737eb9d -r 40ae56bb7fa0 Dockerfile
--- a/Dockerfile	Mon Jul 03 23:36:26 2017 +0300
+++ b/Dockerfile	Tue Jul 04 00:00:46 2017 +0300
@@ -15,7 +15,7 @@
 
 RUN make -B install PREFIX=/opt/pngtile
 RUN /opt/pngtile/bin/pip install -r requirements.txt
-RUN /opt/pngtile/bin/python setup.py build_ext
+RUN /opt/pngtile/bin/python setup.py build_ext -I /opt/pngtile/include -L /opt/pngtile/lib -R /opt/pngtile/lib
 RUN /opt/pngtile/bin/python setup.py install
 
 WORKDIR /opt/pngtile