migra a version nueva de shenvs

pkgs/default.nix

@@ -1,34 +1,6 @@
 pkgs:
 with pkgs.lib; let
-  inherit (pkgs) buildEnv callPackage writeTextDir;
-
-  importAll = { root, exclude ? [] }:
-
-    # adapted from http://chriswarbo.net/projects/nixos/useful_hacks.html
-    let
-      basename = removeSuffix ".nix";
-
-      isMatch = name: type: (hasSuffix ".nix" name || type == "directory")
-                         && ! elem name (map basename exclude);
-
-      entry = name: _: {
-        name = basename name;
-        value = import (root + "/${name}");
-      };
-    in
-      mapAttrs' entry (filterAttrs isMatch (builtins.readDir root));
-
+  inherit (pkgs) callPackage;
 in {
-  shenvs = let
-    build = name: { paths, enter ? null }: buildEnv {
-      name = "shenv-${name}";
-      paths = (optional (enter != null) (writeTextDir "lib/shenv/enter" enter))
-            ++ paths;
-    };
-  in mapAttrs (name: shenv: build name (shenv pkgs)) (importAll {
-    root = ../shenvs;
-    exclude = [ "config" ];
-  });
-
-  vscode-extensions = pkgs.callPackage ./vscode.nix {};
+  vscode-extensions = callPackage ./vscode.nix {};
 }