Install build-base

Dockerfile

 COPY	requirements.txt /tmp
 
 RUN	apk --no-cache add \
+		build-base \
 		gcc \
 		libc-dev \
 		libffi-dev \
 	pip3 install --no-cache-dir --upgrade pip && \
 	pip3 install --no-cache-dir -r /tmp/requirements.txt && \
 	apk del \
+		build-base \
 		gcc \
 		libc-dev \
 		libffi-dev \