diff --git a/build-constraints.yaml b/build-constraints.yaml
index 348fda1b..8bf70f1a 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -5290,6 +5290,7 @@ packages:
         - generic-type-functions
         - generic-data-functions
         - flatparse
+        - singleraeh
         - strongweak
         - mason
         - fortran-src-extras
@@ -5335,7 +5336,7 @@ packages:
         - MultipletCombiner
 
     "Kazu Yamamoto <kazu@iij.ad.jp> @kazu-yamamoto":
-        - crypton #< 1.0.0   # https://github.com/commercialhaskell/stackage/issues/7398
+        - crypton < 1.0.0   # https://github.com/commercialhaskell/stackage/issues/7398
         - crypton-connection < 0.4.0 # https://github.com/commercialhaskell/stackage/issues/7425
         - crypton-x509
         - crypton-x509-store