diff --git a/src/Distribution/Nixpkgs/Haskell/FromCabal/PostProcess.hs b/src/Distribution/Nixpkgs/Haskell/FromCabal/PostProcess.hs
index cf943422b..81b1a3547 100644
--- a/src/Distribution/Nixpkgs/Haskell/FromCabal/PostProcess.hs
+++ b/src/Distribution/Nixpkgs/Haskell/FromCabal/PostProcess.hs
@@ -226,9 +226,8 @@ xmonadPostInstall :: String
 xmonadPostInstall = unlines
   [ "postInstall = ''"
   , "  shopt -s globstar"
-  , "  mkdir -p $doc/share/man/man1"
-  , "  mv \"$data/\"**\"/man/\"*[0-9] $doc/share/man/man1/"
-  , "  rm \"$data/\"**\"/man/\"*"
+  , "  mkdir -p $out/share/man/man1"
+  , "  cp ./man/xmonad.1 $out/share/man/man1/"
   , "'';"
   ]