From d4f51e6961b8f63d8fc8ef965f2d35ec5dd6c8ee Mon Sep 17 00:00:00 2001
From: chansuke <moonset20@gmail.com>
Date: Sat, 18 Sep 2021 14:14:23 +0900
Subject: [PATCH] Fix duplicated PATH entries

---
 src/env_var.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/env_var.rs b/src/env_var.rs
index ebc7d81bc5e..87008e162a1 100644
--- a/src/env_var.rs
+++ b/src/env_var.rs
@@ -26,7 +26,12 @@ pub fn prepend_path(name: &str, value: Vec<PathBuf>, cmd: &mut Command) {
     let mut parts: Vec<PathBuf>;
     if let Some(ref v) = old_value {
         parts = value;
-        parts.extend(env::split_paths(v).collect::<Vec<_>>());
+        parts
+            .iter()
+            .filter(|&x| x != v)
+            .cloned()
+            .collect::<Vec<PathBuf>>()
+            .extend(env::split_paths(v).collect::<Vec<_>>());
     } else {
         parts = value;
     }