linux: run make install in parallel

This improves build times significantly, from 20min to 9min on the aarch64 community box.
2019-12-15 16:04:53 +01:00 · 2019-12-15 16:04:53 +01:00 · a69064eebc
commit a69064eebc
parent 39037a3431
1 changed files with 4 additions and 0 deletions
--- a/pkgs/os-specific/linux/kernel/manual-config.nix
+++ b/pkgs/os-specific/linux/kernel/manual-config.nix
@ -164,6 +164,10 @@ let
      ] ++ (optional isModular "INSTALL_MOD_PATH=$(out)")
      ++ optional installsFirmware "INSTALL_FW_PATH=$(out)/lib/firmware";

+      preInstall = ''
+        installFlagsArray+=("-j$NIX_BUILD_CORES")
+      '';
+
      # Some image types need special install targets (e.g. uImage is installed with make uinstall)
      installTargets = [ (
        if platform ? kernelInstallTarget then platform.kernelInstallTarget