diff --git a/pkgs/development/tools/build-managers/bazel/default.nix b/pkgs/development/tools/build-managers/bazel/default.nix
index 16e31eaf5a8..dcdc55f0aef 100644
--- a/pkgs/development/tools/build-managers/bazel/default.nix
+++ b/pkgs/development/tools/build-managers/bazel/default.nix
@@ -1,8 +1,8 @@
-{ stdenv, fetchurl, jdk, zip, unzip, bash, makeWrapper }:
+{ stdenv, fetchurl, jdk, zip, unzip, bash, makeWrapper, which }:
 
 stdenv.mkDerivation rec {
 
-  version = "0.4.4";
+  version = "0.4.5";
 
   meta = with stdenv.lib; {
     homepage = http://github.com/bazelbuild/bazel/;
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "https://github.com/bazelbuild/bazel/releases/download/${version}/bazel-${version}-dist.zip";
-    sha256 = "1fwfahkqi680zyxmdriqj603lpacyh6cg6ff25bn9bkilbfj2anm";
+    sha256 = "0asmq3kxnl4326zhgh13mvcrc8jvmiswjj4ymrq0943q4vj7nwrb";
   };
 
   sourceRoot = ".";
@@ -42,6 +42,7 @@ stdenv.mkDerivation rec {
     zip
     unzip
     makeWrapper
+    which
   ];
 
   # These must be propagated since the dependency is hidden in a compressed
@@ -58,6 +59,10 @@ stdenv.mkDerivation rec {
   buildPhase = ''
     export TMPDIR=/tmp
     ./compile.sh
+    ./output/bazel --output_user_root=/tmp/.bazel build //scripts:bash_completion \
+      --spawn_strategy=standalone \
+      --genrule_strategy=standalone
+    cp bazel-bin/scripts/bazel-complete.bash output/
   '';
 
   # Build the CPP and Java examples to verify that Bazel works.
@@ -76,6 +81,9 @@ stdenv.mkDerivation rec {
     mkdir -p $out/bin
     mv output/bazel $out/bin
     wrapProgram "$out/bin/bazel" --prefix PATH : "${stdenv.cc}/bin:${jdk}/bin"
+    mkdir -p $out/share/bash-completion/completions $out/share/zsh/site-functions
+    mv output/bazel-complete.bash $out/share/bash-completion/completions/
+    cp scripts/zsh_completion/_bazel $out/share/zsh/site-functions/
   '';
 
   dontStrip = true;