diff --git a/build-constraints.yaml b/build-constraints.yaml
index f73863a0..79981343 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -362,7 +362,7 @@ packages:
         - async
         - base16-bytestring
         - c2hs
-        - csv-conduit
+        - csv-conduit < 0 # BuildFailureException Process exited with ExitFailure 1: ./Setup build
         - executable-hash
         - executable-path
         - foreign-store
@@ -401,7 +401,7 @@ packages:
         - http-conduit
 
     "Omari Norman <omari@smileystation.com> @massysett":
-        - rainbow < 0 # build failure with GHC 8.4 https://github.com/massysett/rainbow/issues/6
+        - rainbow
         - rainbox < 0 # GHC 8.4 via rainbow
         - multiarg
         - cartel < 0 # GHC 8.4 BuildFailureException Process exited with ExitFailure 1: ./Setup build