Update build process to use local files too

bin/build

@@ -7,10 +7,8 @@ set -e
 BUILD_ROOT=$(realpath "${BASH_SOURCE[0]%/*}/..")
 source "$BUILD_ROOT/lib/message-helpers.sh"
 
-# Set default architecture
 ARCH=${ARCH:-x86_64}
 
-# Prepare build directories
 ARCH_DIR="$BUILD_ROOT/output/$ARCH"
 SRC_DIR="$BUILD_ROOT/src"
 BUILD_DIR="$BUILD_ROOT/build"
@@ -124,6 +122,7 @@ DOCKER_ARGS=(
   -v "$BUILD_ROOT/output:/output"
   -v "$SRC_DIR:/src"
   -v "$BUILD_DIR:/build:ro"
+  -v "$BUILD_ROOT/pkgbuilds:/pkgbuilds:ro"
 )
 
 # Use local pacman cache if you already have one on host to speed up repeat runs