diff --git a/build-constraints.yaml b/build-constraints.yaml
index 5209516c..915ed4c2 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -380,7 +380,7 @@ packages:
         - executable-path
         - foreign-store
         - formatting
-        - gtk2hs-buildtools < 0 # GHC 8.4 via Cabal-2.2.0.0
+        - gtk2hs-buildtools
         - happy
         - hybrid-vectors
         - indents
@@ -1195,9 +1195,9 @@ packages:
         # - idris # ansi-terminal-0.8
         - libffi
         - xmonad-contrib < 0 # DependencyFailed (PackageName "xmonad")
-        - cairo < 0 # GHC 8.4 via Cabal-2.2.0.0
-        - glib < 0 # GHC 8.4 via Cabal-2.2.0.0
-        - pango < 0 # GHC 8.4 via Cabal-2.2.0.0
+        - cairo
+        - glib
+        - pango
         - ghcjs-codemirror
         # - ghcjs-dom # http-types 0.12
         # - jsaddle # http-types 0.12