diff --git a/build.gradle.kts b/build.gradle.kts
index 57d7f19..52dcd57 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -166,7 +166,7 @@ tasks {
 
             argsFile.writeText(
                 """
-                |call "${(extra.properties["WIN_BUILD_TOOLS_DIR"] ?: System.getenv("WIN_BUILD_TOOLS_DIR")).let {if (it != null) File(it as String, "vcvarsall.bat").absolutePath else "vcvarsall.bat" }}" x64
+                |call "${(project.extra.properties["WIN_BUILD_TOOLS_DIR"] ?: System.getenv("WIN_BUILD_TOOLS_DIR")).let { if (it != null) File(it as String, "vcvarsall.bat").absolutePath else "vcvarsall.bat" }}" x64
                 |cl /LD /Wall /O2 /I${compiler.metadata.installationPath}/include /I${compiler.metadata.installationPath}/include/win32 ${nativeSources.asPath} /Fe:${output.absolutePath}"
                 """.trimMargin()
             )