Fortran

The Fortran front-end for gcc can be enabled by adding pkgs.gfortran to environment.systemPackages.

If both gcc and gfortran are included, the build may fail with an error of the form: collision between gfortran-wrapper/bin/gcc and gcc-wrapper/bin/gcc.

An example nix flake:

{
  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";

  outputs = {nixpkgs, ...}: let
    system = "x86_64-linux";
    pkgs = nixpkgs.legacyPackages.${system};
  in {
    devShells.${system}.default = pkgs.mkShell {
      packages = with pkgs; [
        gfortran
      ];
    };
  };
}

Run nix develop to enter the nix shell, then compile with gfortran myfile.f.