diff --git a/pkgs/applications/office/libreoffice/default.nix b/pkgs/applications/office/libreoffice/default.nix
index b28ff848c4f..fe53d5ef914 100644
--- a/pkgs/applications/office/libreoffice/default.nix
+++ b/pkgs/applications/office/libreoffice/default.nix
@@ -157,6 +157,10 @@ stdenv.mkDerivation rec {
   preConfigure = ''
     # Needed to find genccode
     PATH=$PATH:${icu}/sbin
+
+    configureFlagsArray=(
+      "--with-parallelism=$NIX_BUILD_CORES"
+    );
   '';
 
   makeFlags = "SHELL=${bash}/bin/bash";