diff --git a/build.sh b/build.sh
index 768ee9a..f162137 100755
--- a/build.sh
+++ b/build.sh
@@ -2,7 +2,12 @@
 set -eu
 
 script_dir=$(cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd)
-build="$script_dir/build"
+base_dir="$1"
+if [ -z "$base_dir" ]; then
+	base_dir="$script_dir"
+fi
+
+build="$base_dir/build"
 	
 if   [ -x "$(command -v g++)"     ]; then cpp_compiler="g++";     c_compiler="gcc";
 elif [ -x "$(command -v clang++)" ]; then cpp_compiler="clang++"; c_compiler="clang";
@@ -68,3 +73,4 @@ base_name=$(basename -- "$shader" .glsl)
 
 $shader_compiler $shader_flags $shader_stage $shader "${shader_out}${base_name}.spv"
 
+