From 8b565e95a470348e424607320c42ceacefc034a0 Mon Sep 17 00:00:00 2001
From: Phil Dyer <phildyer@protonmail.com>
Date: Wed, 15 Sep 2021 11:12:17 +1000
Subject: [PATCH] rPackages: generate-shell.nix works with --pure

generate-R-packages.R fails without these changes.

Without `cacert`, all wget/curl calls will fail
with an error about no valid certificates.

Without `nix`, calling `nix-hash` fails.

An impure nix-shell can get away with not adding
these if the system NIXPKGS version is the same
as the version of NIXPKGS used
with `nix-shell generate-shell.nix`
---
 pkgs/development/r-modules/generate-shell.nix | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/r-modules/generate-shell.nix b/pkgs/development/r-modules/generate-shell.nix
index 9719a61f442..1c96cf05cb5 100644
--- a/pkgs/development/r-modules/generate-shell.nix
+++ b/pkgs/development/r-modules/generate-shell.nix
@@ -5,7 +5,11 @@ stdenv.mkDerivation {
 
   buildCommand = "exit 1";
 
-  buildInputs = [ wget ];
+  buildInputs = [
+    wget
+    cacert
+    nix
+  ];
 
   nativeBuildInputs = [
     (rWrapper.override {