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-rw-r--r--pkgs/applications/science/logic/isabelle/default.nix3
1 files changed, 1 insertions, 2 deletions
diff --git a/pkgs/applications/science/logic/isabelle/default.nix b/pkgs/applications/science/logic/isabelle/default.nix
index 4d8df2f08808..2471aa8b594c 100644
--- a/pkgs/applications/science/logic/isabelle/default.nix
+++ b/pkgs/applications/science/logic/isabelle/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, perl, nettools, polyml, emacs, emacsPackages }:
+{ stdenv, fetchurl, perl, nettools, polyml, proofgeneral }:
 # nettools needed for hostname
 
 let
@@ -6,7 +6,6 @@ let
   version = "2009-1";
   name = "${pname}${version}";
   theories = ["HOL" "FOL" "ZF"];
-  proofgeneral = (emacsPackages emacs).proofgeneral;
 in
 
 stdenv.mkDerivation {