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build a FHS container

I’m using GNU Guix System on my computer

OpenWRT and Buildroot can’t compile use GNU Guix

because they are not considered for non-FHS environments

so I use docker and singularity to make it work

process

mkdir crosswork
cd crosswork
touch Dockerfile
$EDITOR Dockerfile
sudo docker build -t crosswork .
sudo docker run --name crosswork crosswork /bin/sh
sudo docker export crosswork -o crosswork.tar
sqfstar crosswork.squashfs < crosswork.tar
singularity shel -e crosswork.squashfs
bash
cd path/to/buildroot/
make menuconfig
make