diff --git a/build-constraints.yaml b/build-constraints.yaml
index b78af7dd..98f77345 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -127,10 +127,10 @@ packages:
         - accelerate-fourier < 0 # GHC 8.4 via accelerate
         - accelerate-utility < 0 # GHC 8.4 via accelerate
         - alsa-core
-        - alsa-pcm # 0 # build failure with GHC 8.4
+        - alsa-pcm < 0 # build failure with GHC 8.4
         - alsa-seq
         - apportionment
-        - audacity # 0 # build failure with GHC 8.4
+        - audacity < 0 # build failure with GHC 8.4
         - bibtex
         - buffer-pipe
         - calendar-recycling