diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index b74515e9e04..eea7e175816 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -1026,6 +1026,9 @@ self: super: {
   # https://github.com/dmwit/encoding/pull/3
   encoding = appendPatch super.encoding ./patches/encoding-Cabal-2.0.patch;
 
+  # Work around overspecified constraint on github ==0.18.
+  github-backup = doJailbreak super.github-backup;
+
 }
 
 //