Update regression test for issue #4154 after the fix for issue #415.

This commit addresses the comments in PR #5183.

cabal-testsuite/PackageTests/Regression/T4154/install-time-with-constraint.out

-# cabal update
-Downloading the latest package list from test-local-repo
 # cabal new-build
 Resolving dependencies...
 Build profile: -w ghc-<GHCVER> -O1

cabal-testsuite/PackageTests/Regression/T4154/install-time-with-constraint.test.hs

@@ -2,16 +2,20 @@ import Test.Cabal.Prelude
 
 -- Test that unqualified command line constraints do not constrain setup
 -- dependencies. cabal should be able to install the local time-99999 by
--- building its setup script with the installed time, even though the installed
--- time doesn't fit the constraint.
-main = cabalTest $ withRepo "repo" $ do
+-- building its setup script with the installed Cabal, which depends on the
+-- installed time, even though the installed time doesn't fit the constraint.
+main = cabalTest $ do
+  -- TODO: Run this test on Windows once #5187 is resolved.
+  skipIf =<< isWindows
+
   cabal "new-build" ["time", "--constraint=time==99999", "--dry-run"]
 
   -- Temporarily disabled recording here because output is not stable
   recordMode DoNotRecord $ do
-      r <- fails $ cabal' "new-build" ["time", "--constraint=any.time==99999", "--constraint=setup.Cabal installed", "--dry-run"]
-      -- Constraining all uses of 'time' originally resulted in a cyclic dependency
-      -- between 'Cabal' and the new 'time':
-      -- assertOutputContains "cyclic dependencies; conflict set: time:setup.Cabal, time:setup.time" r
-      -- However, this doesn't work anymore, so instead we more directly look for:
-      assertOutputContains "time:setup.time~>time-99999 (conflict: time:setup.Cabal" r
+    -- Constraining all uses of 'time' fails because the installed 'time'
+    -- doesn't fit the constraint.
+    r <- fails $ cabal' "new-build" ["time", "--constraint=any.time==99999", "--dry-run"]
+    assertRegex "Expected cabal to reject the setup dependency on the installed time"
+                ("rejecting: time:setup.time-[0-9.]*/installed-[^[:space:]]* "
+                  ++ "\\(constraint from command line flag requires ==99999\\)")
+                r

cabal-testsuite/PackageTests/Regression/T4154/repo/Cabal-99999/Cabal.cabal

-name:            Cabal
-version:         99999
-cabal-version:   >=1.8
-build-type:      Simple
-
-library
-  build-depends: base, time