diff --git a/app/ghcup/BrickMain.hs b/app/ghcup/BrickMain.hs
index 4e21adf..e23724f 100644
--- a/app/ghcup/BrickMain.hs
+++ b/app/ghcup/BrickMain.hs
@@ -442,7 +442,6 @@ install' _ (_, ListResult {..}) = do
               , DownloadFailed
               , NoUpdate
               , TarDirDoesNotExist
-              , IsolatedDirNotEmpty
               ]
 
   run (do
diff --git a/app/ghcup/Main.hs b/app/ghcup/Main.hs
index 382ddc8..aef3ed7 100644
--- a/app/ghcup/Main.hs
+++ b/app/ghcup/Main.hs
@@ -1478,7 +1478,6 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                       , TarDirDoesNotExist
                       , NextVerNotFound
                       , NoToolVersionSet
-                      , IsolatedDirNotEmpty
                       ]
 
           let runInstTool mInstPlatform action' = do
diff --git a/lib/GHCup.hs b/lib/GHCup.hs
index 6874737..da07ff2 100644
--- a/lib/GHCup.hs
+++ b/lib/GHCup.hs
@@ -405,7 +405,6 @@ installCabalBindist :: ( MonadMask m
 #if !defined(TAR)
                           , ArchiveResult
 #endif
-                          , IsolatedDirNotEmpty
                           ]
                          m
                          ()
@@ -426,8 +425,7 @@ installCabalBindist dlinfo ver isoFilepath = do
         )
         (throwE $ AlreadyInstalled Cabal ver)
 
-    Just isoDir ->
-      liftE $ isolatedInstallSanityCheck isoDir
+    _ -> pure () -- check isn't required in isolated installs
 
   -- download (or use cached version)
   dl <- liftE $ downloadCached dlinfo Nothing
@@ -500,7 +498,6 @@ installCabalBin :: ( MonadMask m
 #if !defined(TAR)
                       , ArchiveResult
 #endif
-                      , IsolatedDirNotEmpty
                       ]
                      m
                      ()