Unblock dhall, in the spirit of #4860

build-constraints.yaml

@@ -158,7 +158,7 @@ packages:
     "Phil de Joux <phil.dejoux@blockscope.com> @philderbeast":
         - siggy-chardust
         - detour-via-sci
-        - hpack-dhall < 0 # via dhall & dhall-json
+        - hpack-dhall < 0 # via hpack
 
     "Matthew Ahrens <matt.p.ahrens@gmail.com> @mpahrens":
         - forkable-monad
@@ -1048,9 +1048,10 @@ packages:
         - turtle
         - foldl
         - bench
-        - dhall < 0 # via cborg-json
-        - dhall-bash < 0 # via dhall
-        - dhall-json < 0 # via dhall
+        - dhall
+        - dhall-bash
+        - dhall-json
+        - aeson-yaml  # req'd by dhall-json
         # - dhall-nix # deriving-compat via hnix
 
     "Andrew Thaddeus Martin <andrew.thaddeus@gmail.com> @andrewthad":
@@ -1119,7 +1120,7 @@ packages:
 
     "Ben Gamari <ben@smart-cactus.org> @bgamari":
         - vector-fftw < 0 # GHC 8.4 via base-4.11.0.0
-        - cborg-json < 0 # via base-4.13.0.0
+        - cborg-json
 
     "Roman Cheplyaka <roma@ro-che.info> @feuerbach":
         - action-permutations
@@ -3414,7 +3415,7 @@ packages:
     "Peter Trško <peter.trsko@gmail.com> @trskop":
         - between
         - connection-pool
-        - verbosity < 0 # via dhall
+        - verbosity
 
     "Devon Hollowood <devonhollowood@gmail.com> @devonhollowood":
         - search-algorithms
@@ -5263,7 +5264,6 @@ expected-test-failures:
     # Missing test files in sdist
     # Hopefully gets fixed in the next release...
     - crypto-pubkey # https://github.com/vincenthz/hs-crypto-pubkey/issues/23
-    - dhall-json # https://github.com/dhall-lang/dhall-haskell/issues/996
     - doctest-discover # 0.1.0.9 https://github.com/karun012/doctest-discover/issues/22
     - graylog # 0.1.0.1 https://github.com/fpco/stackage/pull/1254