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-rw-r--r--gnu/packages/haskell-xyz.scm3
1 files changed, 3 insertions, 0 deletions
diff --git a/gnu/packages/haskell-xyz.scm b/gnu/packages/haskell-xyz.scm
index 5999f521ff..644b3ce7a6 100644
--- a/gnu/packages/haskell-xyz.scm
+++ b/gnu/packages/haskell-xyz.scm
@@ -2279,6 +2279,9 @@ a vocabulary for working with them.")
         (base32
          "0gg62ccl94kvh7mnvdq09pifqxjx2kgs189si90nmg44bafj7a9n"))))
     (build-system haskell-build-system)
+    (arguments
+     `(#:cabal-revision
+       ("1" "1h2955ahga6i4fn7k8v66l03v77p6fhsac6ck8gpabkc08ij60wp")))
     (inputs
      `(("ghc-tuple-th" ,ghc-tuple-th)
        ("ghc-contravariant" ,ghc-contravariant)