diff --git a/modules/common/shell/0_nushell.nix b/modules/common/shell/0_nushell.nix
index f96211a..95b3822 100644
--- a/modules/common/shell/0_nushell.nix
+++ b/modules/common/shell/0_nushell.nix
@@ -15,9 +15,11 @@ in {
     programs.nushell = enabled {
       inherit package;
 
-      inherit (config.environment) shellAliases;
       inherit environmentVariables;
 
+      shellAliases = config.environment.shellAliases
+        |> filterAttrs (_: value: value != null);
+
       configFile.text = readFile ./0_nushell.nu;
     };
   })];
diff --git a/modules/linux/shell/default.nix b/modules/linux/shell/default.nix
index 56eed90..7c29478 100644
--- a/modules/linux/shell/default.nix
+++ b/modules/linux/shell/default.nix
@@ -1,5 +1,5 @@
 { config, lib, pkgs, ... }: let
-  inherit (lib) concatStringsSep const flatten getAttr mapAttrsToList unique;
+  inherit (lib) concatStringsSep const flatten getAttr mapAttrsToList mkForce unique;
 in {
   users.defaultUserShell = pkgs.crash;
 
@@ -12,4 +12,9 @@ in {
   |> map (drv: "${drv}${drv.shellPath}")
   |> unique
   |> concatStringsSep ":";
+
+  environment.shellAliases = {
+    ls = mkForce null;
+    l  = mkForce null;
+  };
 }
diff --git a/rebuild.nu b/rebuild.nu
index deda31e..3ac8e08 100755
--- a/rebuild.nu
+++ b/rebuild.nu
@@ -17,7 +17,7 @@ def --wrapped sync [...arguments] {
 # Rebuild a NixOS / Darwin config.
 def main --wrapped [
   host: string = "" # The host to build.
-  --remote (-r)     # Whether if this is a remote host. The config will be built on this host if it is.
+  --remote          # Whether if this is a remote host. The config will be built on this host if it is.
   ...arguments      # The arguments to pass to `nh {os,darwin} switch` and `nix` (separated by --).
 ]: nothing -> nothing {
   let host = if ($host | is-not-empty) {
@@ -34,6 +34,10 @@ def main --wrapped [
   }
 
   if $remote {
+    ssh -tt ("root@" + $host) "
+      rm --recursive --force ncc
+    "
+
     git ls-files
     | sync --files-from - ./ $"root@($host):ncc"