diff --git a/src/runtime/haskell/pgf2.cabal b/src/runtime/haskell/pgf2.cabal
index beb137b03..77dc779e0 100644
--- a/src/runtime/haskell/pgf2.cabal
+++ b/src/runtime/haskell/pgf2.cabal
@@ -50,7 +50,7 @@ test-suite basic
   default-language: Haskell2010
   build-depends:
     base,
-    HUnit,
+    HUnit >= 1.6.1.0,
     random,
     directory,
     pgf2
@@ -61,5 +61,5 @@ test-suite transactions
   default-language: Haskell2010
   build-depends:
     base,
-    HUnit,
+    HUnit >= 1.6.1.0,
     pgf2
diff --git a/src/runtime/haskell/stack.yaml b/src/runtime/haskell/stack.yaml
index 3b1a3092b..f7a9f5cbb 100644
--- a/src/runtime/haskell/stack.yaml
+++ b/src/runtime/haskell/stack.yaml
@@ -1,3 +1,5 @@
-# This is mainly here so that I can run `stack sdist` for uploading to Hackage
-
 resolver: lts-12.26 # ghc 8.4.4
+
+extra-deps:
+  - HUnit-1.6.2.0@sha256:1a79174e8af616117ad39464cac9de205ca923da6582825e97c10786fda933a4,1588
+  - call-stack-0.4.0@sha256:ac44d2c00931dc20b01750da8c92ec443eb63a7231e8550188cb2ac2385f7feb,1200