post_install() {
	cat <<HERE
Set GHDL_PREFIX variable to /opt/fpga-toolchain/lib/ghdl in your profile
e. g. like this:
  echo 'export GHDL_PREFIX=/opt/fpga-toolchain/lib/ghdl' >>~/.profile
Add /opt/fpga-toolchain/bin to your PATH:
  echo 'export PATH=/opt/fpga-toolchain/bin:\$PATH' >> ~/.profile
HERE
}

post_upgrade() {
    post_install
}