Fix caching

Author: fendor

cabal-install/src/Distribution/Client/ProjectBuilding.hs

@@ -378,12 +378,13 @@ packageFileMonitorKeyValues elab =
     --
     elab_config =
         elab {
-            elabBuildTargets   = [],
-            elabTestTargets    = [],
-            elabBenchTargets   = [],
-            elabReplTarget     = Nothing,
-            elabHaddockTargets = [],
-            elabBuildHaddocks  = False
+            elabBuildTargets     = [],
+            elabBuildInfoTargets = [],
+            elabTestTargets      = [],
+            elabBenchTargets     = [],
+            elabReplTarget       = Nothing,
+            elabHaddockTargets   = [],
+            elabBuildHaddocks    = False
         }
 
     -- The second part is the value used to guard the build step. So this is

cabal-install/src/Distribution/Client/ProjectPlanning.hs

@@ -2624,6 +2624,7 @@ pkgHasEphemeralBuildTargets elab =
  || (not . null) (elabTestTargets elab)
  || (not . null) (elabBenchTargets elab)
  || (not . null) (elabHaddockTargets elab)
+ || (not . null) (elabBuildInfoTargets elab)
  || (not . null) [ () | ComponentTarget _ subtarget <- elabBuildTargets elab
                       , subtarget /= WholeComponent ]