From ce709163f2df2de0fa8691add5acdecc440d126c Mon Sep 17 00:00:00 2001
From: Florian Klink <flokli@flokli.de>
Date: Mon, 28 Dec 2020 16:49:46 +0100
Subject: [PATCH] libraspberrypi: fix output

libraspberrypi provided an empty directory. The during
https://github.com/NixOS/nixpkgs/pull/107637, this was refactored to use
cmakeFlags.

cmakeFlags can't use `$out` directly. `$out` is a bash variable, so to
use it there, `${placeholder "out"}` is needed, otherwise it'll
pick `"$out"` literally.
---
 pkgs/development/libraries/libraspberrypi/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/libraspberrypi/default.nix b/pkgs/development/libraries/libraspberrypi/default.nix
index 57a8a0e191a..664b8d1a7e0 100644
--- a/pkgs/development/libraries/libraspberrypi/default.nix
+++ b/pkgs/development/libraries/libraspberrypi/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake pkg-config ];
   cmakeFlags = [
     (if (stdenv.hostPlatform.isAarch64) then "-DARM64=ON" else "-DARM64=OFF")
-    "-DVMCS_INSTALL_PREFIX=$out"
+    "-DVMCS_INSTALL_PREFIX=${placeholder "out"}"
   ];
 
   meta = with stdenv.lib; {