set 8 fails on raspberry pi

[snizzleorg]

./homebridge-pi.sh build
Sending build context to Docker daemon 111.6 kB
Step 1 : FROM resin/rpi-raspbian:jessie
 ---> 35a28f38c0bb
Step 2 : MAINTAINER Patrick Busch <p@trickbusch.de>
 ---> Using cache
 ---> 3263e1f87cb5
Step 3 : RUN apt-get update
 ---> Using cache
 ---> 21ab4a37f7a2
Step 4 : ENV LANG en_US.UTF-8
 ---> Using cache
 ---> e71912a3305b
Step 5 : ENV LC_ALL en_US.UTF-8
 ---> Using cache
 ---> 21d69df1d7fa
Step 6 : ENV DEBIAN_FRONTEND noninteractive
 ---> Using cache
 ---> c2c213eff996
Step 7 : ENV TERM xterm
 ---> Using cache
 ---> d4d10c8c56df
Step 8 : RUN apt-get install -y curl wget git apt-transport-https python build-essential make g++ libavahi-compat-libdnssd-dev libkrb5-dev vim net-tools
 ---> Running in 1c2468611ac7
Reading package lists...
Building dependency tree...
E: Unable to locate package curl
E: Unable to locate package wget
E: Unable to locate package git
E: Unable to locate package apt-transport-https
E: Unable to locate package python
E: Unable to locate package build-essential
E: Unable to locate package make
E: Unable to locate package libavahi-compat-libdnssd-dev
E: Unable to locate package libkrb5-dev
E: Unable to locate package vim
E: Unable to locate package net-tools
The command '/bin/sh -c apt-get install -y curl wget git apt-transport-https python build-essential make g++ libavahi-compat-libdnssd-dev libkrb5-dev vim net-tools' returned a non-zero code: 100

any idea why that might happen?

[snizzleorg]

my bad. for whatever reason this is necessary so that the docker images actually have network on a raspberry pi:

sysctl net.ipv4.conf.docker0.forwarding=1
systemctl restart docker.service