diff --git a/cabal-testsuite/PackageTests/Regression/T4154/cabal.project b/cabal-testsuite/PackageTests/Regression/T4154/cabal.project
new file mode 100644
index 00000000000..e6fdbadb439
--- /dev/null
+++ b/cabal-testsuite/PackageTests/Regression/T4154/cabal.project
@@ -0,0 +1 @@
+packages: .
diff --git a/cabal-testsuite/PackageTests/Regression/T4154/install-time-with-constraint.test.hs b/cabal-testsuite/PackageTests/Regression/T4154/install-time-with-constraint.test.hs
new file mode 100644
index 00000000000..11074178310
--- /dev/null
+++ b/cabal-testsuite/PackageTests/Regression/T4154/install-time-with-constraint.test.hs
@@ -0,0 +1,8 @@
+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" $
+       cabal "new-build" ["time", "--constraint=time==99999", "--dry-run"]
diff --git a/cabal-testsuite/PackageTests/Regression/T4154/repo/Cabal-99999/Cabal.cabal b/cabal-testsuite/PackageTests/Regression/T4154/repo/Cabal-99999/Cabal.cabal
new file mode 100644
index 00000000000..2742fc2fc55
--- /dev/null
+++ b/cabal-testsuite/PackageTests/Regression/T4154/repo/Cabal-99999/Cabal.cabal
@@ -0,0 +1,7 @@
+name:            Cabal
+version:         99999
+cabal-version:   >=1.8
+build-type:      Simple
+
+library
+  build-depends: base, time
diff --git a/cabal-testsuite/PackageTests/Regression/T4154/time.cabal b/cabal-testsuite/PackageTests/Regression/T4154/time.cabal
new file mode 100644
index 00000000000..ad72efcdae9
--- /dev/null
+++ b/cabal-testsuite/PackageTests/Regression/T4154/time.cabal
@@ -0,0 +1,10 @@
+name:            time
+version:         99999
+cabal-version:   >=1.8
+build-type:      Custom
+
+custom-setup
+  setup-depends: base, Cabal == 99999
+
+library
+  build-depends: base