replace "pkgs" arguments with individual packages

apps/basilisk.nix

@@ -1,15 +1,15 @@
-{ pkgs ? import <nixpkgs> {} }:
+{ buildFHSEnv, fetchzip }:
 let
   version = "20250220145130";
   sha256 = "sha256-DAlBmfBdkv8wwghykxJ4H5TSlGBhmdLaWzv35rNTDzE=";
 
-  basilisk = pkgs.fetchzip {
+  basilisk = fetchzip {
     url = "https://dl.basilisk-browser.org/" +
           "basilisk-${version}.linux-x86_64-gtk3.tar.xz";
     inherit sha256;
   };
 in
-pkgs.buildFHSEnv {
+buildFHSEnv {
   pname = "basilisk";
   inherit version;
   targetPkgs = pkgs:

apps/firefox-esr-alias.nix

@@ -1,5 +1,4 @@
-{ pkgs ? import <nixpkgs> {} }:
-let inherit (pkgs) stdenv firefox-esr; in
+{ stdenv, firefox-esr }:
 stdenv.mkDerivation {
   pname = "firefox-esr-alias";
   inherit (firefox-esr) version;

apps/isabelle.nix

@@ -1,13 +1,13 @@
-{ pkgs    ? import <nixpkgs> {},
+{ fetchzip, buildFHSEnv,
   version ? "2024",
 }:
 let
-  isabelle = pkgs.fetchzip {
+  isabelle = fetchzip {
     url = "https://isabelle.in.tum.de/dist/Isabelle${version}_linux.tar.gz";
     sha256 = "08d0zg4j12rya0qphdjfvxmy02mhrbzc6i1wy0hjfklpk2x1ml2s";
   };
 in
-pkgs.buildFHSEnv {
+buildFHSEnv {
   pname = "isabelle";
   inherit version;
   targetPkgs = pkgs:

apps/multi-ghc.nix

@@ -1,9 +1,8 @@
-{ pkgs     ? import <nixpkgs> {},
+{ haskell, lib, stdenv,
   versions ? [ "8.10" "9.0" "9.2" "9.4" "9.6" "9.8" "9.10" "9.12" ],
 }:
 let
   inherit (builtins) attrValues replaceStrings;
-  inherit (pkgs)     lib stdenv haskell;
 
   toPkg = version:
     "ghc" + replaceStrings ["."] [""] version;