diff --git a/build-constraints.yaml b/build-constraints.yaml
index 153b2bbd..14876e1f 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -25,7 +25,7 @@ packages:
 
     "Pasqualino Assini <tittoassini@gmail.com> @tittoassini":
         - zm
-        - flat
+        # - flat # https://github.com/ndmitchell/derive/issues/25
         - model
 
     "Timo Koepke <timo.koepke@gmail.com> @koepket":
@@ -2317,9 +2317,9 @@ packages:
 
     "Takahiro Himura <himuratk421@gmail.com> @thimura":
         - lens-regex
-        - twitter-conduit
-        - twitter-types
-        - twitter-types-lens
+        # - twitter-conduit # https://github.com/ndmitchell/derive/issues/25
+        # - twitter-types # https://github.com/ndmitchell/derive/issues/25
+        # - twitter-types-lens # https://github.com/ndmitchell/derive/issues/25
 
     # "Robbin C. <robbinch33@gmail.com> robbinch":
         # - zim-parser # via: lzma