diff --git a/components/constellation/pipeline.rs b/components/constellation/pipeline.rs
index e8a6ab3c05b..0f5ee424df4 100644
--- a/components/constellation/pipeline.rs
+++ b/components/constellation/pipeline.rs
@@ -28,6 +28,7 @@ use servo_config::opts::{self, Opts};
 use servo_config::prefs::{PREFS, Pref};
 use servo_url::ServoUrl;
 use std::collections::HashMap;
+#[cfg(not(windows))]
 use std::env;
 use std::ffi::OsStr;
 use std::io::Error as IOError;
diff --git a/components/gfx/lib.rs b/components/gfx/lib.rs
index e314b7b8f39..fb94e7b779f 100644
--- a/components/gfx/lib.rs
+++ b/components/gfx/lib.rs
@@ -4,7 +4,7 @@
 
 // For SIMD
 #![feature(cfg_target_feature)]
-#![cfg_attr(any(target_os = "linux", target_os = "android", target_os = "windows"), feature(heap_api))]
+#![cfg_attr(any(target_os = "linux", target_os = "android"), feature(heap_api))]
 
 #![feature(alloc)]
 #![feature(box_syntax)]