diff --git a/build-constraints.yaml b/build-constraints.yaml
index b1a1e8ad9..e03a338fb 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -89,6 +89,7 @@ packages:
         - xor
         - http-io-streams
         - github
+        - microaeson
 
     "Diogo Biazus <diogo@biazus.ca>":
         - hasql-notifications
@@ -607,6 +608,8 @@ packages:
         - prettyprinter-compat-ansi-wl-pprint
         - prettyprinter-compat-annotated-wl-pprint
         - prettyprinter-convert-ansi-wl-pprint
+        - HsYAML
+        - HsYAML-aeson
 
     "Joe M <joe9mail@gmail.com> @joe9":
         - logger-thread
@@ -3055,7 +3058,6 @@ packages:
         - commonmark-extensions
         - commonmark-pandoc
         - unicode-collation
-        - HsYAML-aeson
         - ipynb
 
     "Karun Ramakrishnan <karun012@gmail.com> @karun012":
@@ -4691,7 +4693,7 @@ packages:
         - bitwise-enum
 
     "Shlomo Shuck <stevenjshuck@gmail.com> @sjshuck":
-        - pcre2
+        - pcre2 < 2.2 # https://github.com/commercialhaskell/stackage/issues/6593
 
     "Emil Axelsson <78emil@gmail.com> @emax":
         - tree-view
@@ -4849,7 +4851,6 @@ packages:
         - HTTP
         - HasBigDecimal
         - HsOpenSSL
-        - HsYAML
         - JuicyPixels-scale-dct
         - MemoTrie
         - NoHoed