From af811f3dbc950149191c81ea21bd10adbc3743dc Mon Sep 17 00:00:00 2001
From: Julian Ospald <hasufell@posteo.de>
Date: Tue, 28 Jul 2020 21:40:26 +0200
Subject: [PATCH] `nub` result in getInstalledCabals

---
 lib/GHCup/Utils.hs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/GHCup/Utils.hs b/lib/GHCup/Utils.hs
index 0f04867..052a057 100644
--- a/lib/GHCup/Utils.hs
+++ b/lib/GHCup/Utils.hs
@@ -245,7 +245,7 @@ getInstalledCabals = do
     Just (Left  _) -> pure $ Left f
     Nothing        -> pure $ Left f
   cs <- cabalSet -- for legacy cabal
-  pure $ maybe vs (\x -> Right x:vs) cs
+  pure $ maybe vs (\x -> nub $ Right x:vs) cs
 
 
 -- | Whether the given cabal version is installed.