diff --git a/reference/haskell/Poseidon2.hs b/reference/haskell/src/Poseidon2.hs
similarity index 100%
rename from reference/haskell/Poseidon2.hs
rename to reference/haskell/src/Poseidon2.hs
diff --git a/reference/haskell/Poseidon2/Example.hs b/reference/haskell/src/Poseidon2/Example.hs
similarity index 100%
rename from reference/haskell/Poseidon2/Example.hs
rename to reference/haskell/src/Poseidon2/Example.hs
diff --git a/reference/haskell/Poseidon2/Merkle.hs b/reference/haskell/src/Poseidon2/Merkle.hs
similarity index 100%
rename from reference/haskell/Poseidon2/Merkle.hs
rename to reference/haskell/src/Poseidon2/Merkle.hs
diff --git a/reference/haskell/Poseidon2/Permutation.hs b/reference/haskell/src/Poseidon2/Permutation.hs
similarity index 100%
rename from reference/haskell/Poseidon2/Permutation.hs
rename to reference/haskell/src/Poseidon2/Permutation.hs
diff --git a/reference/haskell/Poseidon2/RoundConsts.hs b/reference/haskell/src/Poseidon2/RoundConsts.hs
similarity index 100%
rename from reference/haskell/Poseidon2/RoundConsts.hs
rename to reference/haskell/src/Poseidon2/RoundConsts.hs
diff --git a/reference/haskell/Poseidon2/Sponge.hs b/reference/haskell/src/Poseidon2/Sponge.hs
similarity index 100%
rename from reference/haskell/Poseidon2/Sponge.hs
rename to reference/haskell/src/Poseidon2/Sponge.hs
diff --git a/reference/haskell/Sampling.hs b/reference/haskell/src/Sampling.hs
similarity index 100%
rename from reference/haskell/Sampling.hs
rename to reference/haskell/src/Sampling.hs
diff --git a/reference/haskell/Slot.hs b/reference/haskell/src/Slot.hs
similarity index 100%
rename from reference/haskell/Slot.hs
rename to reference/haskell/src/Slot.hs
diff --git a/reference/haskell/storage-proof-ref.cabal b/reference/haskell/storage-proof-ref.cabal
index 376514d..b446fa4 100644
--- a/reference/haskell/storage-proof-ref.cabal
+++ b/reference/haskell/storage-proof-ref.cabal
@@ -45,7 +45,7 @@ Library
   Default-Language:    Haskell2010
   Default-Extensions:  CPP, BangPatterns
 
-  Hs-Source-Dirs:      .
+  Hs-Source-Dirs:      src
 
   ghc-options:         -fwarn-tabs -fno-warn-unused-matches -fno-warn-name-shadowing -fno-warn-unused-imports