diff --git a/src/assproc.js b/src/assproc.js
index 8fb7dec..bf457ca 100644
--- a/src/assproc.js
+++ b/src/assproc.js
@@ -59,7 +59,7 @@ exports.process = async function(root, options) {
                             const bvProps = [];
 
                             for(const bvName in options.buildVars)
-                                bvProps.push(`${bvName}: { value: ${JSON.stringify(options.buildVars[bvName])}, writable: false }`);
+                                bvProps.push(`${bvName}: { value: ${JSON.stringify(options.buildVars[bvName])} }`);
 
                             if(Object.keys(bvProps).length > 0)
                                 output += `Object.defineProperties(${bvTarget}, { ${bvProps.join(', ')} });\n`;