Install hopefully pip, setuptools and wheel in each base image

docker/1_base/Dockerfile

@@ -5,6 +5,6 @@ RUN set -ex; \
     apt-get update; \
     DEBIAN_FRONTEND=noninteractive apt-get install \
       -qyy -o APT::Install-Recommends=false -o APT::Install-Suggests=false \
-      tzdata openssl ca-certificates locales rustc; \
+      tzdata openssl ca-certificates locales rustc python3-pip python3-setuptools python3-wheel; \
     locale-gen en_US.UTF-8 en_GB.UTF-8 nl_NL.UTF-8
 ENV LANG en_US.UTF-8

docker/2_buildpy/buildpy.docker

@@ -7,6 +7,7 @@ RUN sed -i 's/^# deb-src/deb-src/' /etc/apt/sources.list && \
         build-essential \
         apache2-dev \
         checkinstall \
+        rustc python3-pip python3-setuptools python3-wheel \
         curl
 
 RUN apt-get build-dep -y python3.6

docker/3_buildwheels/Dockerfile

@@ -5,7 +5,7 @@ RUN set -ex; \
     apt-get update; \
     DEBIAN_FRONTEND=noninteractive apt-get install -qy \
     git \
-    rustc \
+    rustc python3-setuptools python3-wheel python3-pip \
     build-essential \
     checkinstall \
     libffi-dev \

docker/4_run/Dockerfile

@@ -11,7 +11,7 @@ RUN set -ex; \
         libjpeg8 \
         libtiff5 \
         ffmpeg \
-        rustc \
+        rustc python3-setuptools python3-wheel python3-pip \
         rsyslog logrotate \
         nano vim-tiny curl; \
     rm -rf /var/lib/apt/lists/*