diff --git a/components/style/build.rs b/components/style/build.rs
index 9a3d0169c24..607f895c297 100644
--- a/components/style/build.rs
+++ b/components/style/build.rs
@@ -69,7 +69,8 @@ fn generate_properties() {
         }
     }
 
-    let script = Path::new(file!()).parent().unwrap().join("properties").join("build.py");
+    let script = Path::new(&env::var("CARGO_MANIFEST_DIR").unwrap())
+        .join("properties").join("build.py");
     let product = if cfg!(feature = "gecko") { "gecko" } else { "servo" };
     let status = Command::new(&*PYTHON)
         .arg(&script)