From 1986e432438ec82092dbf5c56e97ca340de511f7 Mon Sep 17 00:00:00 2001
From: Adam Joseph <adam@westernsemico.com>
Date: Sun, 20 Feb 2022 22:59:53 -0800
Subject: [PATCH] signify: allow cross-compilation

---
 pkgs/tools/security/signify/default.nix | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/pkgs/tools/security/signify/default.nix b/pkgs/tools/security/signify/default.nix
index fb3df51167b..3ac6f58dce9 100644
--- a/pkgs/tools/security/signify/default.nix
+++ b/pkgs/tools/security/signify/default.nix
@@ -16,10 +16,12 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ libbsd ];
 
-  preInstall = ''
-    export PREFIX=$out
+  postPatch = ''
+    substituteInPlace Makefile --replace "shell pkg-config" "shell $PKG_CONFIG"
   '';
 
+  installFlags = [ "PREFIX=$(out)" ];
+
   meta = with lib; {
     description = "OpenBSD signing tool";
     longDescription = ''