More packages failing to build

build-constraints.yaml

@@ -4479,6 +4479,8 @@ packages:
         - HPDF < 0
         - llvm-hs < 0
         - large-hashable < 0
+        - gtk2hs-buildtools < 0
+        - hprotoc < 0
 
         # transitive dependencies of packages failing to build
         - jvm < 0
@@ -4869,7 +4871,12 @@ skipped-tests:
     - megaparsec
     - higher-leveldb
     - generic-lens
-
+    - butter
+    - distributed-closure
+    - binary-ext
+    - multiarg
+    - skylighting-core
+    - kanji
 
     # Transitive outdated dependencies
     # These can also be checked for updates periodically.