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-rw-r--r--pkgs/applications/science/math/giac/default.nix3
1 files changed, 3 insertions, 0 deletions
diff --git a/pkgs/applications/science/math/giac/default.nix b/pkgs/applications/science/math/giac/default.nix
index d684865432d5c..434291861d674 100644
--- a/pkgs/applications/science/math/giac/default.nix
+++ b/pkgs/applications/science/math/giac/default.nix
@@ -43,6 +43,9 @@ stdenv.mkDerivation rec {
     rm src/mkjs
     substituteInPlace src/Makefile.am --replace "g++ mkjs.cc" \
       "${buildPackages.stdenv.cc.targetPrefix}c++ mkjs.cc"
+
+    # to open help
+    substituteInPlace src/global.cc --replace 'browser="mozilla"' 'browser="xdg-open"'
   '';
 
   nativeBuildInputs = [