Don't re-initialise packageConfiguration in Stage2, see #66.

src/Base.hs

@@ -72,9 +72,11 @@ packageConfiguration :: Stage -> FilePath
 packageConfiguration Stage0 = "libraries/bootstrapping.conf"
 packageConfiguration _      = "inplace/lib/package.conf.d"
 
+-- StageN, N > 0, share the same packageConfiguration (see above)
 packageConfigurationInitialised :: Stage -> FilePath
 packageConfigurationInitialised stage =
-    shakeFilesPath -/- "package-configuration-initialised-" ++ stageString stage
+    shakeFilesPath -/- "package-configuration-initialised-"
+    ++ stageString (min stage Stage1)
 
 -- Utility functions
 -- | Find and replace all occurrences of a value in a list

src/Rules/Cabal.hs

@@ -42,7 +42,7 @@ cabalRules = do
     -- When the file exists, the packageConfiguration has been initialised
     -- TODO: get rid of an extra file?
 
-    forM_ [Stage0 ..] $ \stage ->
+    forM_ [Stage0, Stage1] $ \stage ->
         packageConfigurationInitialised stage %> \out -> do
             let target  = PartialTarget stage cabal
                 pkgConf = packageConfiguration stage