diff --git a/pkgs/applications/networking/cluster/istioctl/default.nix b/pkgs/applications/networking/cluster/istioctl/default.nix
index e4197a50ef15..e04d799248ef 100644
--- a/pkgs/applications/networking/cluster/istioctl/default.nix
+++ b/pkgs/applications/networking/cluster/istioctl/default.nix
@@ -1,18 +1,18 @@
-{ lib, buildGoModule, fetchFromGitHub, go-bindata }:
+{ lib, buildGoModule, fetchFromGitHub, go-bindata, installShellFiles }:
 
 buildGoModule rec {
   pname = "istioctl";
-  version = "1.6.5";
+  version = "1.6.6";
 
   src = fetchFromGitHub {
     owner = "istio";
     repo = "istio";
     rev = version;
-    sha256 = "0xga0vjr2nfbxwbawly8vg9vnpavxbmc1agg2a3cp1ncmzfrgpcx";
+    sha256 = "0njchcb58lxk0cixk2rz4qj7b0zpp6zf3i5dda43j4hfsb37mifj";
   };
-  vendorSha256 = "15l9z2a8p46jvmkl0vvm6s196mlics0qgmpm3yq3bn6cqnybdsij";
+  vendorSha256 = "0cc0lmjsxrn3f78k95wklf3yn5k7h8slwnwmssy1i1h0bkcg1bai";
 
-  nativeBuildInputs = [ go-bindata ];
+  nativeBuildInputs = [ go-bindata installShellFiles ];
 
   # Bundle charts
   preBuild = ''
@@ -28,10 +28,17 @@ buildGoModule rec {
       "istio.io/pkg/version.buildTag=${version}"
       "istio.io/pkg/version.buildHub=docker.io/istio"
     ];
-  in ["-ldflags=${lib.concatMapStringsSep " " (attr: "-X ${attr}") attrs}"];
+  in ["-ldflags=-s -w ${lib.concatMapStringsSep " " (attr: "-X ${attr}") attrs}"];
 
   subPackages = [ "istioctl/cmd/istioctl" ];
 
+  postInstall = ''
+    $out/bin/istioctl collateral --man --bash --zsh
+    installManPage *.1
+    installShellCompletion istioctl.bash
+    installShellCompletion --zsh _istioctl
+  '';
+
   meta = with lib; {
     description = "Istio configuration command line utility for service operators to debug and diagnose their Istio mesh";
     homepage = "https://istio.io/latest/docs/reference/commands/istioctl";