diff --git a/pkgs/tools/backup/btrbk/default.nix b/pkgs/tools/backup/btrbk/default.nix
index 71e1807603c8..cd45edfa2d5f 100644
--- a/pkgs/tools/backup/btrbk/default.nix
+++ b/pkgs/tools/backup/btrbk/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, coreutils, bash, btrfs-progs, openssh, perl, perlPackages
-, utillinux, asciidoc, asciidoctor, makeWrapper }:
+, utillinux, asciidoc, asciidoctor, mbuffer, makeWrapper }:
 
 stdenv.mkDerivation rec {
   pname = "btrbk";
@@ -38,15 +38,15 @@ stdenv.mkDerivation rec {
   preFixup = ''
     wrapProgram $out/sbin/btrbk \
       --set PERL5LIB $PERL5LIB \
-      --prefix PATH ':' "${stdenv.lib.makeBinPath [ btrfs-progs bash openssh ]}"
+      --prefix PATH ':' "${stdenv.lib.makeBinPath [ btrfs-progs bash mbuffer openssh ]}"
   '';
 
   meta = with stdenv.lib; {
     description = "A backup tool for btrfs subvolumes";
-    homepage = http://digint.ch/btrbk;
+    homepage = https://digint.ch/btrbk;
     license = licenses.gpl3;
     platforms = platforms.unix;
-    maintainers = with maintainers; [ the-kenny ];
+    maintainers = with maintainers; [ asymmetric the-kenny ];
     inherit version;
   };
 }