From eb5a89a9d9959a3fa321545c1d31267937b6a4a6 Mon Sep 17 00:00:00 2001
From: Leo Zhang <leo@leozhang.me>
Date: Sat, 27 Jun 2020 01:00:13 -0700
Subject: [PATCH] fix: Don't use --detached, fixes #6888

---
 cabal-install/src/Distribution/Client/VCS.hs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cabal-install/src/Distribution/Client/VCS.hs b/cabal-install/src/Distribution/Client/VCS.hs
index 49addef110c..2f30c5e502a 100644
--- a/cabal-install/src/Distribution/Client/VCS.hs
+++ b/cabal-install/src/Distribution/Client/VCS.hs
@@ -384,7 +384,7 @@ vcsGit =
                            Just peerLocalDir -> ["--reference", peerLocalDir]
                       ++ verboseArg
                          where loc = srpLocation
-        checkoutArgs   = "checkout" : verboseArg ++ ["--detach", "--force"
+        checkoutArgs   = "checkout" : verboseArg ++ ["--force"
                          , checkoutTarget, "--" ]
         checkoutTarget = fromMaybe "HEAD" (srpBranch `mplus` srpTag)
         verboseArg     = [ "--quiet" | verbosity < Verbosity.normal ]