rm -rf nim/ install_dir/
git clone --branch v1.4.0 --depth 1 https://github.com/nim-lang/Nim.git nim/
git clone --depth 1 https://github.com/nim-lang/csources.git nim/csources/
(cd nim/csources/ && sh build.sh)
(cd nim/ && bin/nim c koch)
(cd nim/ && ./koch boot -d:release)
(cd nim/ && ./koch tools)
(cd nim/ && ./koch nimble)
(cd nim/ && ./koch install "../install_dir")