Minor follow-up to 09bb6dd7

This was missed in the original commit because it requires a different
flag(lib) setting...

cabal-install/cabal-install.cabal

@@ -406,7 +406,7 @@ executable cabal
             random     >= 1        && < 1.2,
             stm        >= 2.0      && < 3,
             tar        >= 0.5.0.3  && < 0.6,
-            time       >= 1.4      && < 1.8,
+            time       >= 1.4      && < 1.9,
             zlib       >= 0.5.3    && < 0.7,
             hackage-security >= 0.5.2.2 && < 0.6