diff --git a/pkgs/development/tools/backblaze-b2/default.nix b/pkgs/development/tools/backblaze-b2/default.nix
index 3c7d69bc1b40..0ba346ec110f 100644
--- a/pkgs/development/tools/backblaze-b2/default.nix
+++ b/pkgs/development/tools/backblaze-b2/default.nix
@@ -1,31 +1,37 @@
-{ stdenv, lib, fetchFromGitHub, pkgs }:
+{ fetchFromGitHub, makeWrapper, pythonPackages, stdenv }:
 
-stdenv.mkDerivation rec {
-  name = "backblaze-b2-0.3.10";
+pythonPackages.buildPythonApplication rec {
+  name = "backblaze-b2-${version}";
+  version = "0.4.4";
 
   src = fetchFromGitHub {
     owner = "Backblaze";
     repo = "B2_Command_Line_Tool";
-    rev = "b097f0f04d3f88d7a372b50ee6db1f89a5249028";
-    sha256 = "1rcy8180476cpmrbls4424qbq8nyq7mxkfikd52a8skz7rd5ljc6";
+    rev = "74a5e567925899f1fc6204aa85d4c84c0d0e511a";
+    sha256 = "1g9j5s69w6n70nb18rvx3gm9f4gi1vis23ib8rn2v1khv6z2acqp";
   };
-  
-  buildInputs = with pkgs; [ python2 ];
 
-  doCheck = true;
+  propagatedBuildInputs = with pythonPackages; [ six ];
+
   checkPhase = ''
     python test_b2_command_line.py test
   '';
 
-  installPhase = ''
-    install -Dm755 b2 "$out/bin/backblaze-b2"
+  postInstall = ''
+    mv "$out/bin/b2" "$out/bin/backblaze-b2"
+
+    sed 's/^have b2 \&\&$/have backblaze-b2 \&\&/'   -i contrib/bash_completion/b2
+    sed 's/^\(complete -F _b2\) b2/\1 backblaze-b2/' -i contrib/bash_completion/b2
+
+    mkdir -p "$out/etc/bash_completion.d"
+    cp contrib/bash_completion/b2 "$out/etc/bash_completion.d/backblaze-b2"
   '';
 
   meta = with stdenv.lib; {
     description = "Command-line tool for accessing the Backblaze B2 storage service";
-    homepage    = https://github.com/Backblaze/B2_Command_Line_Tool;
-    license     = licenses.mit;
-    maintainers = with maintainers; [ kevincox ];
-    platforms   = platforms.unix;
+    homepage = https://github.com/Backblaze/B2_Command_Line_Tool;
+    license = licenses.mit;
+    maintainers = with maintainers; [ hrdinka kevincox ];
+    platforms = platforms.unix;
   };
 }