diff --git a/cabal-install/Distribution/Client/ProjectPlanning.hs b/cabal-install/Distribution/Client/ProjectPlanning.hs
index 3827a8e22a6..2a8db6a60cd 100644
--- a/cabal-install/Distribution/Client/ProjectPlanning.hs
+++ b/cabal-install/Distribution/Client/ProjectPlanning.hs
@@ -2824,7 +2824,10 @@ packageHashInputs
     }) =
     PackageHashInputs {
       pkgHashPkgId       = packageId elab,
-      pkgHashComponent   = Nothing,
+      pkgHashComponent   =
+        case elabPkgOrComp elab of
+          ElabPackage _ -> Nothing
+          ElabComponent comp -> Just (compSolverName comp),
       pkgHashSourceHash  = srchash,
       pkgHashPkgConfigDeps = Set.fromList (elabPkgConfigDependencies elab),
       pkgHashDirectDeps  =