diff --git a/build-constraints.yaml b/build-constraints.yaml
index d95e81bc..e51c4f4c 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3960,33 +3960,8 @@ packages:
         - herms < 0 # GHC 8.4 via vty
         - hledger-iadd < 0 # GHC 8.4 via vty
         - yi-frontend-vty < 0 # GHC 8.4 via vty
-        - webdriver-angular < 0 # GHC 8.4 via wai-app-static
-        - MFlow < 0 # GHC 8.4 via wai-extra
-        - Spock < 0 # GHC 8.4 via wai-extra
-        - filter-logger < 0 # GHC 8.4 via wai-extra
-        - hledger-web < 0 # GHC 8.4 via wai-extra
-        - hspec-wai < 0 # GHC 8.4 via wai-extra
-        - microformats2-parser < 0 # GHC 8.4 via wai-extra
-        - wai-cli < 0 # GHC 8.4 via wai-extra
-        - wai-cors < 0 # GHC 8.4 via wai-extra
-        - yesod < 0 # GHC 8.4 via wai-extra
-        - yesod-auth-hashdb < 0 # GHC 8.4 via wai-extra
-        - yesod-paginator < 0 # GHC 8.4 via wai-extra
-        - hledger-web < 0 # GHC 8.4 via wai-handler-launch
-        - serversession-frontend-wai < 0 # GHC 8.4 via wai-session
-        - wai-cors < 0 # GHC 8.4 via wai-websockets
-        - wai-transformers < 0 # GHC 8.4 via wai-websockets
-        - yesod-websockets < 0 # GHC 8.4 via wai-websockets
         - web-routes-hsp < 0 # GHC 8.4 via web-routes
         - web-routes-wai < 0 # GHC 8.4 via web-routes
-        - gdax < 0 # GHC 8.4 via websockets
-        - tidal < 0 # GHC 8.4 via websockets
-        - transient-universe < 0 # GHC 8.4 via websockets
-        - wai-cors < 0 # GHC 8.4 via websockets
-        - wai-transformers < 0 # GHC 8.4 via websockets
-        - websockets-snap < 0 # GHC 8.4 via websockets
-        - wuss < 0 # GHC 8.4 via websockets
-        - yesod-websockets < 0 # GHC 8.4 via websockets
         - bitcoin-api < 0 # GHC 8.4 via wreq
         - bitcoin-api-extra < 0 # GHC 8.4 via wreq
         - datasets < 0 # GHC 8.4 via wreq
@@ -4053,7 +4028,6 @@ packages:
         - mysql-haskell-openssl < 0 # GHC 8.4 via mysql-haskell
         - messagepack-rpc < 0 # GHC 8.4 via network-simple
         - distributed-process < 0 # GHC 8.4 via network-transport-tcp
-        - serversession < 0 # GHC 8.4 via nonce
         - pipes-aeson < 0 # GHC 8.4 via pipes-attoparsec
         - pipes-fastx < 0 # GHC 8.4 via pipes-attoparsec
         - hasql < 0 # GHC 8.4 via postgresql-binary
@@ -4295,15 +4269,6 @@ packages:
         - validity-aeson < 0 # GHC 8.4 via validity-text
         - genvalidity-time < 0 # GHC 8.4 via validity-time
         - hledger-ui < 0 # GHC 8.4 via vty
-        - wai-middleware-consul < 0 # GHC 8.4 via wai
-        - wai-middleware-prometheus < 0 # GHC 8.4 via wai
-        - wai-middleware-consul < 0 # GHC 8.4 via wai-app-static
-        - wai-middleware-consul < 0 # GHC 8.4 via wai-conduit
-        - wai-middleware-consul < 0 # GHC 8.4 via wai-extra
-        - websockets-rpc < 0 # GHC 8.4 via wai-transformers
-        - websockets-simple < 0 # GHC 8.4 via wai-transformers
-        - websockets-rpc < 0 # GHC 8.4 via websockets
-        - websockets-simple < 0 # GHC 8.4 via websockets
         - rose-trees < 0 # GHC 8.4 via witherable
         - sets < 0 # GHC 8.4 via witherable
         - yi-core < 0 # GHC 8.4 via yi-rope
@@ -4444,10 +4409,6 @@ packages:
         - atom-conduit < 0 # GHC 8.4 via timerep
         - docker < 0 # GHC 8.4 via uuid
         - simple-session < 0 # GHC 8.4 via simple
-        - fn < 0 # GHC 8.4 via wai-extra
-        - simple-session < 0 # GHC 8.4 via wai-extra
-        - wai-app-static < 0 # GHC 8.4 via wai-extra
-        - wai-websockets < 0 # GHC 8.4 via websockets
         - hledger-lib < 0 # GHC 8.4 via hashtables
         - skylighting < 0 # GHC 8.4 via hxt
         - skylighting-core < 0 # GHC 8.4 via hxt
@@ -4465,8 +4426,6 @@ packages:
         - mongoDB < 0 # GHC 8.4 via nonce
         - mongoDB < 0 # GHC 8.4 via pureMD5
         - mongoDB < 0 # GHC 8.4 via random-shuffle
-        - wai-middleware-crowd < 0 # GHC 8.4 via wai-app-static
-        - wai-middleware-crowd < 0 # GHC 8.4 via wai-extra
         - mysql-haskell < 0 # GHC 8.4 via wire-streams
         - soap < 0 # GHC 8.4 via xml-conduit-writer
         - soap-openssl < 0 # GHC 8.4 via soap
@@ -4475,7 +4434,6 @@ packages:
         - xml-isogen < 0 # GHC 8.4 via dom-parser
         - kdt < 0 # GHC 8.4 via heap
         - yesod-static < 0 # GHC 8.4 via hjsmin
-        - yesod-static < 0 # GHC 8.4 via wai-app-static
         - yesod-static < 0 # GHC 8.4 via yesod-test
         - google-oauth2-jwt < 0 # GHC 8.4 via RSA
         - urlpath < 0 # GHC 8.4 via attoparsec-uri
@@ -4492,6 +4450,10 @@ packages:
         - eventful-core < 0 # GHC 8.4 via uuid
         - persistent-template < 0 # GHC 8.4 via persistent
         - slug < 0 # GHC 8.4 via persistent
+        - MFlow < 0 # GHC 8.4 via RefSerialize
+        - MFlow < 0 # GHC 8.4 via TCache
+        - MFlow < 0 # GHC 8.4 via Workflow
+        - wai-middleware-prometheus < 0 # GHC 8.4 via prometheus-client
 
 
     "GHC upper bounds":