diff --git a/pkgs/tools/system/rex/default.nix b/pkgs/tools/system/rex/default.nix
index cf59a22cecee2..f27c2d1fd2afb 100644
--- a/pkgs/tools/system/rex/default.nix
+++ b/pkgs/tools/system/rex/default.nix
@@ -1,21 +1,50 @@
-{ pkgs, lib, fetchurl, perlPackages, rsync, installShellFiles, ... }:
-
+{ pkgs, lib, fetchurl, fetchpatch, perl, perlPackages, rsync, which, installShellFiles, ... }:
 perlPackages.buildPerlPackage rec {
   pname = "Rex";
-  version = "1.13.4";
+  version = "1.14.0";
   src = fetchurl {
     url = "mirror://cpan/authors/id/F/FE/FERKI/Rex-${version}.tar.gz";
-    sha256 = "a86e9270159b41c9a8fce96f9ddc97c5caa68167ca4ed33e97908bfce17098cf";
+    hash = "sha256-RHxJbkaEjKF9lkl6JYFp2pvcKQurRGUU7FfM/m5lSz8=";
   };
+
   buildInputs = with perlPackages; [
     FileShareDirInstall
     ParallelForkManager
     StringEscape
     TestDeep
     TestOutput
+    TestWarnings
     TestUseAllModules
+    TestException
+    SubOverride
 
     rsync
+    which
+  ];
+
+  # These are part of a greater effort to add better support upstream:
+  # https://github.com/RexOps/Rex/compare/master...nixos
+  patches = [
+    # Fix rex's ability to execute things on NixOS managed hosts
+    (fetchpatch {
+      url = "https://github.com/RexOps/Rex/commit/c71f3b255dac8f929abea46913798f132566af55.patch";
+      hash = "sha256-S2tF3IZ96QrxDN3HfBk7RWDZcEwukQYAkSId51dATiU=";
+    })
+    # Fix explicit calls to /bin/mv and /bin/rm
+    (fetchpatch {
+      url = "https://github.com/RexOps/Rex/commit/2782e80bb9789d3afb42e08904c28a4366a58334.patch";
+      hash = "sha256-htm39fF2tumG5b5E1ZBRX5n3vRaZZZzn2lfSN1omP8s=";
+    })
+    # Fix for PATH assumptions
+    (fetchpatch {
+      url = "https://github.com/RexOps/Rex/commit/ec72c8d1fdddf9116afdb21091100fe7cc20f41a.patch";
+      hash = "sha256-a/Sns2f596dbAWbuIveNldc/V3MwR08/ocXVgx0Tbcw=";
+    })
+    # Fix explicit path in Sudo.pm
+    (fetchpatch {
+      url = "https://github.com/RexOps/Rex/commit/f0b312f42178e7e4271b5b010c00efb5cdba2970.patch";
+      hash = "sha256-n/+huVCM8zpgx2LZgMB41PPIYgNhF6AK8+4FGPQH+FU=";
+    })
   ];
 
   nativeBuildInputs = with perlPackages; [ installShellFiles ParallelForkManager ];
@@ -42,8 +71,6 @@ perlPackages.buildPerlPackage rec {
     YAML
   ];
 
-  doCheck = false;
-
   outputs = [ "out" ];
 
   fixupPhase = ''