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-rw-r--r--gnu/packages/haskell.scm4
1 files changed, 4 insertions, 0 deletions
diff --git a/gnu/packages/haskell.scm b/gnu/packages/haskell.scm
index 5857540d23..c6a8376aa1 100644
--- a/gnu/packages/haskell.scm
+++ b/gnu/packages/haskell.scm
@@ -1479,6 +1479,10 @@ installation of Haskell libraries and programs.")
(base32
"1icdbj2rshzn0m1zz5wa7v3xvkf6qw811p4s7jgqwvx1ydwrvrfa"))))
(build-system haskell-build-system)
+ (arguments
+ `(#:configure-flags (list "--allow-newer=transformers")))
+ (inputs
+ `(("ghc-transformers" ,ghc-transformers)))
(home-page "https://github.com/ekmett/mtl")
(synopsis
"Monad classes, using functional dependencies")