#ghdl (in its #clang variant), a #freesofware #vhdl analyzer, compiler, simulator and synthesizer, is part now of #guixscience channel. It may be used as any other #guix package with a simple
guix install ghdl-clang
This means too that pre-built substitutes are available online.
@csantosb better to use it as
guix shell ghdl-clang -- ghdl-clang
as installed packages can easily get out of date.