Andres Loeh wrote:

(3) requires to change the user interface builder in

   build-support/buildenv

   Also requires to adapt the Cabal builder (2) accordingly to
   install suitable nix-support files.

Actually, the user environment builder is part of Nix itself. The buildenv thing in Nixpkgs is a fork of that (yes, very ugly) used to make the system path in NixOS.

I've been thinking about making it possible to change the user environment builder without having to upgrade Nix. For instance, nix-env could check to see if there is a package named "build-env" in its input expressions and use that if available. Or it could allow you to install one explicitly.

--
Eelco Dolstra | http://www.st.ewi.tudelft.nl/~dolstra/
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