tiv: add imagemagick to path

Required for e.g. jpg and png support, c.f. stefanhaustein/TerminalImageViewer#56

pkgs/applications/misc/tiv/default.nix

@@ -1,4 +1,9 @@
-{ lib, stdenv, fetchFromGitHub, imagemagick }:
+{ lib
+, stdenv
+, fetchFromGitHub
+, makeWrapper
+, imagemagick
+}:
 
 stdenv.mkDerivation rec {
   pname = "tiv";
@@ -11,12 +16,19 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-mCgybL4af19zqECN1pBV+WnxMq2ZtlK5GDTQO3u9CK0=";
   };
 
+  nativeBuildInputs = [ makeWrapper ];
+
   buildInputs = [ imagemagick ];
 
   makeFlags = [ "prefix=$(out)" ];
 
   preConfigure = "cd src/main/cpp";
 
+  postFixup = ''
+    wrapProgram $out/bin/tiv \
+      --prefix PATH : ${lib.makeBinPath [ imagemagick ]}
+  '';
+
   meta = with lib; {
     homepage = "https://github.com/stefanhaustein/TerminalImageViewer";
     description = "Small C++ program to display images in a (modern) terminal using RGB ANSI codes and unicode block graphics characters";