diff --git a/build.sh b/build.sh
index 95ba736..f280953 100755
--- a/build.sh
+++ b/build.sh
@@ -47,7 +47,8 @@ elif [ -x "$(command -v dmd)"  ]; then d_compiler="dmd";
 else echo "Unable to find D compiler"; exit -1; fi;
 
 codegen_src="${script_dir}/vulkan_codegen.d"
-codegen_out="--of=${build}/vulkan_codegen"
+codegen_out_name="${build}/vulkan_codegen"
+codegen_out="--of=${codegen_out_name}"
 
 $d_compiler $codegen_src $codegen_out