diff --git a/build-constraints.yaml b/build-constraints.yaml
index 7c18936a..dfda8886 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -9,7 +9,7 @@ cabal-format-version: "2.0"
 packages:
     "Fraser Murray <fraser.m.murray@gmail.com @intolerable":
         - stitch
-        
+
     "Yusent Chig <yusent@protonmail.com> @yusent":
         []
         # - yesod-auth-bcryptdb # conduit 1.3, yesod 1.6
@@ -2175,8 +2175,8 @@ packages:
         - mcmc-types
         - mighty-metropolis
         - speedy-slice
-        # - hasty-hamiltonian # https://github.com/jtobin/hasty-hamiltonian/issues/2
-        # - declarative # via hasty-hamiltonian
+        - hasty-hamiltonian
+        - declarative
         - sampling
         - flat-mcmc
 
@@ -3234,7 +3234,7 @@ packages:
     "Avi Press <mail@avi.press> @aviaviavi":
         - curl-runnings
         - cryptocompare
-        
+
     "Jack Kiefer <jack.c.kiefer@gmail.com> @JackKiefer":
         - herms