Make the most important dependency mandatory

setup

@@ -1,12 +1,20 @@
 #!/usr/bin/env bash
 # Minimum requirements to run ./build --download-dependencies
-y=
 if [ $# -eq 1 ]; then
   y=-y
+else
+  y=
 fi
-apt-get update
-apt-get install $y \
+if [ -f /.dockerenv ]; then
+  sudo=
+else
+  sudo=sudo
+fi
+$sudo apt-get update
+$sudo apt-get install $y \
   git \
   python3 \
+  python3-pip \
   python3-distutils \
 ;
+python3 -m pip install --user -r requirements.txt