diff --git a/machines/krz01/_configuration.nix b/machines/krz01/_configuration.nix
index 11f4527..f63a9a1 100644
--- a/machines/krz01/_configuration.nix
+++ b/machines/krz01/_configuration.nix
@@ -7,9 +7,9 @@ lib.extra.mkConfig {
 
   enabledServices = [
     # INFO: This list needs to stay sorted alphabetically
-    # TODO: re-enable me when #139 is merged. "proxmox"
-    "nvidia-tesla-k80"
     "microvm-router01"
+    "nvidia-tesla-k80"
+    "proxmox"
   ];
 
   extraConfig = {
diff --git a/patches/05-pmnos-correctness-build-directory.patch b/patches/05-pmnos-correctness-build-directory.patch
new file mode 100644
index 0000000..0a57672
--- /dev/null
+++ b/patches/05-pmnos-correctness-build-directory.patch
@@ -0,0 +1,54 @@
+From 4d6e57d2d577cc105c9e0cd397408e9e3ce85cd0 Mon Sep 17 00:00:00 2001
+From: Raito Bezarius <masterancpp@gmail.com>
+Date: Tue, 8 Oct 2024 16:33:14 +0200
+Subject: [PATCH] fix(packaging): correctness of the build top directory
+
+It was using /build which is an implementation detail and not
+guaranteed.
+
+Signed-off-by: Raito Bezarius <masterancpp@gmail.com>
+---
+ pkgs/pve-container/default.nix | 6 +++---
+ pkgs/pve-rs/default.nix        | 2 +-
+ 2 files changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/pkgs/pve-container/default.nix b/pkgs/pve-container/default.nix
+index 445c271..5633c0f 100644
+--- a/pkgs/pve-container/default.nix
++++ b/pkgs/pve-container/default.nix
+@@ -30,7 +30,7 @@ perl536.pkgs.toPerlModule (
+     postPatch = ''
+       sed -i Makefile \
+         -e "s/pct.1 pct.conf.5 pct.bash-completion pct.zsh-completion //" \
+-        -e "s,/usr/share/lxc,/build/lxc," \
++        -e "s,/usr/share/lxc,$NIX_BUILD_TOP/lxc," \
+         -e "/pve-doc-generator/d" \
+         -e "/PVE_GENERATING_DOCS/d" \
+         -e "/SERVICEDIR/d" \
+@@ -45,8 +45,8 @@ perl536.pkgs.toPerlModule (
+     dontPatchShebangs = true;
+ 
+     postConfigure = ''
+-      cp -r ${lxc}/share/lxc /build
+-      chmod -R +w /build/lxc
++      cp -r ${lxc}/share/lxc $NIX_BUILD_TOP/
++      chmod -R +w $NIX_BUILD_TOP/lxc
+     '';
+ 
+     makeFlags = [
+diff --git a/pkgs/pve-rs/default.nix b/pkgs/pve-rs/default.nix
+index c024287..881beab 100644
+--- a/pkgs/pve-rs/default.nix
++++ b/pkgs/pve-rs/default.nix
+@@ -57,7 +57,7 @@ perl536.pkgs.toPerlModule (
+     ];
+ 
+     makeFlags = [
+-      "BUILDIR=/build"
++      "BUILDIR=$NIX_BUILD_TOP"
+       "BUILD_MODE=release"
+       "DESTDIR=$(out)"
+       "GITVERSION:=${src.rev}"
+-- 
+2.46.0
+
diff --git a/patches/default.nix b/patches/default.nix
index 691cc88..bec48f0 100644
--- a/patches/default.nix
+++ b/patches/default.nix
@@ -126,4 +126,11 @@ in
       hash = "sha256-SgHhW9HCkDQsxT3eG4P9q68c43e3sbDHRY9qs7oSt8o=";
     }
   ];
+
+  "proxmox-nixos" = [
+    {
+      _type = "static";
+      path = ./05-pmnos-correctness-build-directory.patch;
+    }
+  ];
 }