2 files changed, 10 insertions, 0 deletions
diff --git a/pkgs/tools/compression/xdelta/default.nix b/pkgs/tools/compression/xdelta/default.nix
index 84ccde3fd37d..396099df41cc 100644
--- a/pkgs/tools/compression/xdelta/default.nix
+++ b/pkgs/tools/compression/xdelta/default.nix
@@ -50,6 +50,11 @@ in stdenv.mkDerivation {
   meta = with stdenv.lib; {
     inherit version;
     description = "Binary differential compression in VCDIFF (RFC 3284) format";
+    longDescription = ''
+      xdelta is a command line program for delta encoding, which generates two
+      file differences. This is similar to diff and patch, but it is targeted
+      for binary files and does not generate human readable output.
+    '';
     homepage = http://xdelta.org/;
     license = licenses.gpl2Plus;
     platforms = platforms.linux;
diff --git a/pkgs/tools/compression/xdelta/unstable.nix b/pkgs/tools/compression/xdelta/unstable.nix
index 8637463dfc0d..a19fb4de68a4 100644
--- a/pkgs/tools/compression/xdelta/unstable.nix
+++ b/pkgs/tools/compression/xdelta/unstable.nix
@@ -54,6 +54,11 @@ in stdenv.mkDerivation {
   meta = with stdenv.lib; {
     inherit version;
     description = "Binary differential compression in VCDIFF (RFC 3284) format";
+    longDescription = ''
+      xdelta is a command line program for delta encoding, which generates two
+      file differences. This is similar to diff and patch, but it is targeted
+      for binary files and does not generate human readable output.
+    '';
     homepage = http://xdelta.org/;
     license = licenses.gpl2Plus;
     platforms = platforms.linux;