docker: fix pip command for debian sid
@@ -64,7 +64,7 @@ RUN apt-get update && apt-get -y install \
# Update cache for shared libraries
RUN ldconfig
-RUN pip install cmake-format[yaml]==0.6.3
+RUN pip3 install cmake-format[yaml]==0.6.3
# Google Test
ENV GTEST_ROOT=/opt/gtest
