HTF does not build (skogsbaer/HTF#66)

build-constraints.yaml

@@ -485,7 +485,7 @@ packages:
         - clock
 
     "Stefan Wehr <wehr@factisresearch.com> @skogsbaer":
-        # - HTF # https://github.com/skogsbaer/HTF/issues/66
+        - HTF
         - xmlgen
         - stm-stats
         - large-hashable
@@ -3595,6 +3595,15 @@ packages:
         - yi-mode-javascript < 0 # GHC 8.4 via yi-rope
         - yi-snippet < 0 # GHC 8.4 via yi-rope
 
+        # https://github.com/skogsbaer/HTF/issues/66
+        - HTF < 0
+        - HPDF < 0
+        - buffer-builder < 0
+        - datadog < 0
+        - dataurl < 0
+        - graph-core < 0
+        - ignore < 0
+        - large-hashable < 0
 
     # This section was used to programmatically generate a set of removals
     # that would result in a valid build plan.