diff --git a/pacman/.config/pacman/makepkg.conf b/pacman/.config/pacman/makepkg.conf
index 7f7c55a..cb198fd 100644
--- a/pacman/.config/pacman/makepkg.conf
+++ b/pacman/.config/pacman/makepkg.conf
@@ -1,13 +1,19 @@
-# march=native and flto added
-CFLAGS="-march=native -mtune=native -O2 -pipe -fstack-protector-strong"
-CXXFLAGS="-march=native -mtune=native -O2 -pipe -fstack-protector-strong"
-RUSTFLAGS="-C target_cpu=native"
+#!/hint/bash
+# Modify default build parameters to build native optimizations
+CFLAGS="${CFLAGS/-mtune=generic/-mtune=native}"
+CXXFLAGS="${CXXFLAGS/-mtune=generic/-mtune=native}"
 
-# Do a parallel build.
-MAKEFLAGS="-j6"
+# Enable rust to do the same
+export RUSTFLAGS="-C target_cpu=native"
+
+# Do a parallel build and enable output combining
+MAKEFLAGS="-j$(nproc) -Otarget"
 
 # Use parallel compression
 COMPRESSXZ=(nice xz -c -z -T 0 -)
 
 # Use one central sources dir
-SRCDEST="$HOME/.cache/pacman/sources"
+SRCDEST="${XDG_CACHE_HOME:-$HOME/.cache}/pacman/sources"
+
+# Prefer sha256 checks.
+INTEGRITY_CHECK=(sha256)