diff --git a/maintainers/scripts/haskell/update-stackage.sh b/maintainers/scripts/haskell/update-stackage.sh
index e6980333f8e..4da9f6d28c2 100755
--- a/maintainers/scripts/haskell/update-stackage.sh
+++ b/maintainers/scripts/haskell/update-stackage.sh
@@ -6,7 +6,7 @@ set -eu -o pipefail
 
 # Stackage solver to use, LTS or Nightly
 # (should be capitalized like the display name)
-SOLVER=Nightly
+SOLVER=LTS
 TMP_TEMPLATE=update-stackage.XXXXXXX
 readonly SOLVER
 readonly TMP_TEMPLATE
diff --git a/pkgs/development/haskell-modules/configuration-hackage2nix/stackage.yaml b/pkgs/development/haskell-modules/configuration-hackage2nix/stackage.yaml
index 5393c0f926d..2f4b75ef813 100644
--- a/pkgs/development/haskell-modules/configuration-hackage2nix/stackage.yaml
+++ b/pkgs/development/haskell-modules/configuration-hackage2nix/stackage.yaml
@@ -1,4 +1,4 @@
-# Stackage Nightly 2022-03-17
+# Stackage LTS 19.0
 # This file is auto-generated by
 # maintainers/scripts/haskell/update-stackage.sh
 default-package-overrides:
@@ -2237,7 +2237,6 @@ default-package-overrides:
   - singletons-presburger ==0.6.1.0
   - singletons-th ==3.0
   - siphash ==1.0.3
-  - Sit ==0.2021.1.18
   - sitemap-gen ==0.1.0.0
   - sized ==1.0.0.0
   - skein ==1.0.9.4