configuration.nix

# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ config, pkgs, lib, ... }:

let

  oldTarball =
    fetchTarball "https://nixos.org/channels/nixos-18.09/nixexprs.tar.xz";
  myPkgs = { 
    termonad = pkgs.callPackage ./myPkgs/termonad.nix {};
  }; 

in {
  imports = [ # Include the results of the hardware scan.
 ...
 
 
 environment.systemPackages = ( with pkgs; [ 
   ... 
   myPkgs.termonad 
   ... etc. 
   
   

errors.txt

building '/nix/store/kpyiz96a701c2izlqark36qxy7bq819x-termonad-2.0.0.0.drv'...
unpacking sources
unpacking source archive /nix/store/rcka5aqdhlnyb260d0wvbz2acxb8cvsx-source
source root is source
patching sources
configuring
no configure script, doing nothing
building
/nix/store/l9hi0ywl5rhcxd5ppprqv03adr03icq7-stdenv-linux/setup: line 1311: /nix/store/rcka5aqdhlnyb260d0wvbz2acxb8cvsx-source/default.nix: Permission denied
builder for '/nix/store/kpyiz96a701c2izlqark36qxy7bq819x-termonad-2.0.0.0.drv' failed with exit code 126
cannot build derivation '/nix/store/dx2kdqzkf9pkv03y4dh43x82w28n4n8q-system-path.drv': 1 dependencies couldn't be built
cannot build derivation '/nix/store/qa9l8al82387m6j3fmn6gv3slslyvslk-nixos-system-quasar-nixos-tr-19.03.173408.bd6ba87381e.drv': 1 dependencies couldn't be built
error: build of '/nix/store/qa9l8al82387m6j3fmn6gv3slslyvslk-nixos-system-quasar-nixos-tr-19.03.173408.bd6ba87381e.drv' failed
╭─ashesh@quasar-nixos-tr /etc/nixos  ‹master*› 

termonad.nix

{ pkgs ? import <nixpkgs> {} }: 

pkgs.stdenv.mkDerivation rec { 
  name = "termonad-${version}"; 
  version = "2.0.0.0"; 

  src = pkgs.fetchFromGitHub { 
          owner = "cdepillabout";
          repo = "termonad"; 
          rev = "be7d8c622b0e0fbede743524176b4bd630d7a997"; # add missing sha? 
          sha256 = "1glg3f5dpnpk1mmdba95dmw2vwf8v236hvlvg99q4whd37vha3iy";
        };

  buildPhase = let src = pkgs.fetchFromGitHub { 
          owner = "cdepillabout";
          repo = "termonad"; 
          rev = "be7d8c622b0e0fbede743524176b4bd630d7a997"; # add missing sha? 
          sha256 = "1glg3f5dpnpk1mmdba95dmw2vwf8v236hvlvg99q4whd37vha3iy";
        }; 
        in "${src}/default.nix" ; 

}