From 8e71416e5d4306c3800133ca6dc2ad4469480b90 Mon Sep 17 00:00:00 2001
From: Alyssa Ross <hi@alyssa.is>
Date: Wed, 10 Feb 2021 20:48:54 +0000
Subject: [PATCH] qemu: set localstatedir

Otherwise qemu-qa, qemu-pr-helper, and virtiofsd, try to write to
$out/var at runtime.

Fixes: https://github.com/NixOS/nixpkgs/issues/113909
Fixes: https://github.com/NixOS/nixpkgs/pull/112886
---
 pkgs/applications/virtualization/qemu/default.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkgs/applications/virtualization/qemu/default.nix b/pkgs/applications/virtualization/qemu/default.nix
index 84604c65579f..c04d3b339452 100644
--- a/pkgs/applications/virtualization/qemu/default.nix
+++ b/pkgs/applications/virtualization/qemu/default.nix
@@ -101,6 +101,12 @@ stdenv.mkDerivation rec {
     })
   ];
 
+  # Otherwise tries to ensure /var/run exists.
+  postPatch = ''
+    sed -i "/install_subdir('run', install_dir: get_option('localstatedir'))/d" \
+        qga/meson.build
+  '';
+
   preConfigure = ''
     unset CPP # intereferes with dependency calculation
     # this script isn't marked as executable b/c it's indirectly used by meson. Needed to patch its shebang
@@ -119,6 +125,7 @@ stdenv.mkDerivation rec {
       "--enable-docs"
       "--enable-tools"
       "--enable-guest-agent"
+      "--localstatedir=/var"
       "--sysconfdir=/etc"
     ]
     ++ optional numaSupport "--enable-numa"