diff --git a/home-manager/roles/zsh/zshrc b/home-manager/roles/zsh/zshrc
index 59095240..247d0c6a 100644
--- a/home-manager/roles/zsh/zshrc
+++ b/home-manager/roles/zsh/zshrc
@@ -41,10 +41,10 @@ function title {
 setopt prompt_subst
 autoload -U colors && colors # Enable colors in prompt
 
-alias nom-build-remote="nom build --builders '@/etc/nix/machines'"
-alias nix-build-remote="nix build --builders '@/etc/nix/machines'"
-alias nixpkgs-review-pr-remote='nixpkgs-review pr --build-args "--builders @/etc/nix/machines"'
-alias nixpkgs-review-rev-remote='nixpkgs-review rev --build-args "--builders @/etc/nix/machines"'
+alias nom-build-remote="nom build --builders $(builders-configurators)"
+alias nix-build-remote="nix build --builders $(builders-configurators)"
+alias nixpkgs-review-pr-remote='nixpkgs-review pr --build-args "--builders $(builders-configurators)'
+alias nixpkgs-review-rev-remote='nixpkgs-review rev --build-args "--builders $(builders-configurators)'
 alias accounting='f() { if [[ "$1" == "" ]]; then year="buchhaltung" else year="$1" fi; hledger -f ~/git/buchhaltung/$year.journal ui -- --watch --theme=terminal -X€ -t -E}; f'
 alias o=xdg-open
 alias sudo='sudo -A'
diff --git a/nixos/machines/zeus/configuration.nix b/nixos/machines/zeus/configuration.nix
index 0a2cb156..f676f92d 100644
--- a/nixos/machines/zeus/configuration.nix
+++ b/nixos/machines/zeus/configuration.nix
@@ -24,6 +24,8 @@ in {
 
   age.identityPaths = ["/disk/persist/etc/ssh/ssh_host_ed25519_key"];
 
+  nix.distributedBuilds = false;
+
   fileSystems = let
     btrfsOptions = {options = ["compress=zstd" "autodefrag" "noatime"];};
   in {
diff --git a/nixos/roles/default.nix b/nixos/roles/default.nix
index eb1c77e3..2906acfe 100644
--- a/nixos/roles/default.nix
+++ b/nixos/roles/default.nix
@@ -105,6 +105,7 @@
         nix-output-monitor
         jq
         home-manager
+        builders-configurator
         ;
       inherit (pkgs.python3Packages) qrcode;
     };
diff --git a/nixos/roles/laminar/projects.nix b/nixos/roles/laminar/projects.nix
index 000c9179..e99b76ff 100644
--- a/nixos/roles/laminar/projects.nix
+++ b/nixos/roles/laminar/projects.nix
@@ -11,11 +11,11 @@
       export PATH=${lib.makeBinPath path}:$PATH
       git clone git@localhost:${name} .
       git show -q --oneline
-      export FLAGS="--builders @/etc/nix/machines -o /var/cache/gc-links/$JOB"
+      export FLAGS="--builders @$(${pkgs.builders-configurator}/bin/builders-configurators) -o /var/cache/gc-links/$JOB"
       if [[ -e "flake.nix" ]]; then
         echo "Flake detected."
         echo "Running 'flake check'"
-        ${pkgs.nix}/bin/nix flake check --builders @/etc/nix/machines
+        ${pkgs.nix}/bin/nix flake check $FLAGS
         echo "Running 'nix build'"
         ${pkgs.nix}/bin/nix build $FLAGS
       else
diff --git a/nixos/roles/standalone/default.nix b/nixos/roles/standalone/default.nix
index 9d2bf41c..37d5787d 100644
--- a/nixos/roles/standalone/default.nix
+++ b/nixos/roles/standalone/default.nix
@@ -1,6 +1,7 @@
 {
   pkgs,
   config,
+  lib,
   ...
 }: {
   boot = {
@@ -25,7 +26,7 @@
   '');
 
   nix = {
-    distributedBuilds = true;
+    distributedBuilds = lib.mkDefault true;
     gc = {
       automatic = false;
       options = "-d";
diff --git a/packages/builders-configurator/exe/Main.hs b/packages/builders-configurator/exe/Main.hs
index 624e6a82..6ce37b85 100644
--- a/packages/builders-configurator/exe/Main.hs
+++ b/packages/builders-configurator/exe/Main.hs
@@ -65,8 +65,8 @@ builderConfigs =
   Map.fromList
     [ ("hera", [FirstOf ["zeus-builder"], Use "fluffy-builder", Use "remote-builder", Use "nixbuild.net"])
     , ("apollo", [FirstOf ["zeus-builder-local", "zeus-builder"], FirstOfFinally ["fluffy-builder-local"] "fluffy-builder", Use "remote-builder", Use "nixbuild.net"])
-    , ("fluffy", [FirstOf ["zeus-builder-local"], Use "fluffy-builder-local", Use "remote-builder", Use "nixbuild.net"])
-    , ("zeus", [Use "zeus-builder-local", Use "fluffy-builder-local", Use "remote-builder", Use "nixbuild.net"])
+    , ("fluffy", [FirstOf ["zeus-builder-local"], Use "remote-builder", Use "nixbuild.net"])
+    , ("zeus", [Use "fluffy-builder-local", Use "remote-builder", Use "nixbuild.net"])
     ]
 
 commaList :: [Text] -> Text
@@ -93,15 +93,15 @@ printBuilders = Text.unlines . fmap builderLine . Foldable.foldr' folder []
 
 main :: IO ()
 main = do
-  host : args <- getArgs
-  let withoutConnection =
-        args & \case
-          [] -> False
-          ["--without-connection"] -> True
-          _ -> error [i|Unknown arguments: #{args}|]
-  let
-    builder_tries :: Ping :> es => Eff es [Text]
-    builder_tries = testBuilders $ fromMaybe (error [i|#{host} not found in builderConfigs.|]) $ Map.lookup (into host) builderConfigs
+  args <- getArgs
+  env_host <- fromMaybe (error "accessed $HOST which is not set.") <$> lookupEnv "HOST"
+  let (host, withoutConnection) = case args of
+        [] -> (env_host, False)
+        [host'] -> (host', False)
+        [host', "--without-connection"] -> (host', True)
+        _ -> error [i|Unknown arguments: #{args}|]
+      builder_tries :: Ping :> es => Eff es [Text]
+      builder_tries = testBuilders $ fromMaybe (error [i|#{host} not found in builderConfigs.|]) $ Map.lookup (into host) builderConfigs
   builders <-
     if withoutConnection
       then pure $ Eff.runPureEff $ runWithoutConnectivity builder_tries