1  {
 2    description = "Simple shell in C for fun";
 3  
 4    inputs = {
 5      nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
 6    };
 7  
 8    outputs = { self, nixpkgs }:
 9    let
10      system = "x86_64-linux";
11      pkgs = import nixpkgs { inherit system; };
12      c-shell = pkgs.stdenv.mkDerivation {
13        name = "c-shell";
14        version = "0.1";
15        src = ./.;
16  
17        buildPhase = ''
18          gcc -o c-shell shell.c
19        '';
20  
21        installPhase = ''
22          mkdir -p $out/bin
23          cp c-shell $out/bin/
24        '';
25      };
26    in {
27      packages.${system} = {
28        c-shell = c-shell;
29        default = c-shell;
30      };
31  
32      devShells.${system} = {
33        default = pkgs.mkShell {
34          inputsFrom = [ c-shell ];
35          buildInputs = with pkgs; [
36            valgrind
37          ];
38          shellHook = ''
39            user_shell=$(getent passwd $USER |awk -F: '{print $7}')
40            exec $user_shell
41          '';
42        };
43      };
44    };
45  }