diff --git a/build-constraints.yaml b/build-constraints.yaml
index 57306d64..6ebea747 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -569,7 +569,6 @@ packages:
         - profunctors
         - promises
         - reducers
-        - reducers
         - reflection
         - semigroupoid-extras
         - semigroupoids
@@ -2596,7 +2595,7 @@ packages:
         - LibZip >= 1.0
 
     "Anthony Cowley <acowley@gmail.com> @acowley":
-        - Frames < 0 # test compilation failure
+        - Frames # 0 # test compilation failure
         - hpp
 
     "Takayuki Muranushi <muranushi@gmail.com> @nushio3":
@@ -3415,10 +3414,10 @@ packages:
         - language-c < 0.7
 
         # https://github.com/sol/hpack/issues/202
-        - Glob < 0.9.0
+        # Glob < 0.9.0
 
         # https://github.com/fpco/stackage/issues/2920
-        - fingertree < 0.1.2
+        # fingertree < 0.1.2
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of
@@ -3887,7 +3886,7 @@ expected-test-failures:
 
     # Doctest failures
     - teardown
-    - texmath # https://github.com/fpco/stackage/issues/2929
+    # texmath # https://github.com/fpco/stackage/issues/2929
 
     # Misc.
     - distributed-process-supervisor # # https://github.com/haskell-d
@@ -3924,7 +3923,7 @@ expected-benchmark-failures:
     - picoparsec # https://bitbucket.org/blamario/picoparsec/issues/3/benchmark-compilation-failure
 
     # Compilation failures
-    - Frames # https://github.com/acowley/Frames/issues/47
+    # Frames # https://github.com/acowley/Frames/issues/47
     - cryptohash # https://github.com/vincenthz/hs-cryptohash/pull/43
     - dbus # No issue tracker, sent e-mail to maintainer
     - ghc-mod # https://github.com/DanielG/ghc-mod/issues/895