@@ -290,6 +290,9 @@ defaultStablePackages ghcVer = unPackageMap $ execWriter $ do
290290 addRange "Michael Snoyman" "data-lens" "< 2.10.4"
291291 addRange "Michael Snoyman" "intervals" "< 0.3"
292292
293+ -- https://github.com/fpco/stackage/issues/136
294+ addRange "Michael Snoyman" "dual-tree" "< 0.2"
295+
293296 addRange "Michael Snoyman" "hashable" "< 1.2"
294297
295298 -- Requires binary 0.7