I am trying to build a Haskell program from source and run it. I am using Cabal a Haskell build tool to do this. I am able to build and run this program without the following error messages on other Linux operating systems.
`cabal --version` outputs: ``` cabal-install version 2.4.0.0 compiled using version 2.4.0.1 of the Cabal library ``` I have installed GHC a Haskell compiler. When I run `ghc --version` it outputs: ``` The Glorious Glasgow Haskell Compilation System, version 8.6.5 ``` When I run `cabal new-build` it outputs: ``` cabal: Use of GHC's environment variable GHC_PACKAGE_PATH is incompatible with Cabal. Use the flag --package-db to specify a package database (it can be used multiple times). ``` After running `unset GHC_PACKAGE_PATH` I can build the program with `cabal new-build`. `unset GHC_PACKAGE_PATH` does not persist across different terminal emulator instances. Then when I try to run the program using `cabal new-run` I get this error message: ``` error while loading shared libraries: libgmp.so.10: cannot open shared object file: No such file or directory ``` I added `gmp` to my system configuration and reconfigured the system. However the error persists. The command `locate libgmp.so.10` shows that libgmp.so.10 is in the store. Doing an internet search for this error message shows people dealing with it by setting environment variables. With Cabal's `new-build` and `new-run` commands I am running into issues with environment variables. Are environment variables managed in Guix system configurations? I searched the Guix manual for the search term "environment variable" and did not see a prominent section on environment variables. That leads me to guess that in Guix environment variables are left to configuration files in the users home directory.
