diff --git a/build-constraints.yaml b/build-constraints.yaml
index a4abbbe2..de074a62 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -47,7 +47,7 @@ packages:
         - hexml-lens
         - hp2pretty # With permission of Claude Heiland-Allend
         - floatshow # https://bitbucket.org/dafis/floatshow/issues/1/add-to-stackage
-        # - threepenny-editors # GHC 8.2.1 via threepenny-gui
+        - threepenny-editors
         - clr-inline  # possibly nondeterministic failures, see https://github.com/fpco/stackage/issues/2510
 
 
@@ -141,8 +141,7 @@ packages:
         - ix-shapable
 
     "Jeremy Barisch-Rooney <barischj@tcd.ie> @barischj":
-        []
-        # - threepenny-gui-flexbox # GHC 8.2.1 via threepenny-gui
+        - threepenny-gui-flexbox
 
     "Romain Edelmann <romain.edelmann@gmail.com> @redelmann":
         - distribution
@@ -156,7 +155,7 @@ packages:
     "Simon Jakobi <simon.jakobi@gmail.com> @sjakobi":
         - path
         - present
-        # - threepenny-gui # GHC 8.2.1 via snap-server
+        - threepenny-gui
         - snap-server
 
     "Joe M <joe9mail@gmail.com> @joe9":