1 files changed, 5 insertions, 0 deletions
diff --git a/flake.nix b/flake.nix
index 96823a997..2dcdc28fa 100644
--- a/flake.nix
+++ b/flake.nix
@@ -354,6 +354,8 @@
             name = "nix-build";
             src = self.hydraJobs.tarball;
 
+            enableParallelBuilding = true;
+
             buildInputs = buildDeps;
 
             dontInstall = false;
@@ -366,6 +368,9 @@
             # syntax-check generated dot files, it still requires some
             # fonts.  So provide those.
             FONTCONFIG_FILE = texFunctions.fontsConf;
+
+            # To test building without precompiled headers.
+            makeFlagsArray = [ "PRECOMPILE_HEADERS=0" ];
           };
 
         # System tests.