Aim: getting an environment suitable for working on a third-party development using the current version of Coq (i.e., built from the current state of this repository).
Dive into such an environment, for the project example by running, from the
root of this repository:
./dev/ci/nix/shell example
This will build Coq and the other dependencies of the example project, then
open a shell with all these dependencies available (e.g., coqtop is in path).
Additionally, three environment variables are set, to abstract over the
build-system of that project: configure, make, and clean. Therefore, after
changing the working directory to the root of the sources of that project, the
contents of these variables can be evaluated to respectively set-up, build, and
clean the project.
The dependencies of the third-party developments are split into buildInputs
and coqBuildInputs. The second list gathers the Coq libraries. In case you
only want the non-coq dependencies (because you want to use Coq from your PATH),
set the environment variable NOCOQ to some non-empty value.