iamb: install manpages

pkgs/applications/networking/instant-messengers/iamb/default.nix

@@ -1,6 +1,7 @@
 { lib
 , rustPlatform
 , fetchFromGitHub
+, installShellFiles
 , darwin
 , stdenv
 }:
@@ -18,10 +19,16 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-UbmeEcmUr3zx05Hk36tjsl0Y9ay7DNM1u/3lPqlXN2o=";
 
+  nativeBuildInputs = [ installShellFiles ];
   buildInputs = lib.optionals stdenv.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
   ];
 
+  postInstall = ''
+    OUT_DIR=$releaseDir/build/iamb-*/out
+    installManPage $OUT_DIR/iamb.{1,5}
+  '';
+
   meta = with lib; {
     description = "A Matrix client for Vim addicts";
     homepage = "https://github.com/ulyssa/iamb";