diff --git a/profiles/ManuSurface/Arch/install.fish b/profiles/ManuSurface/Arch/install.fish
new file mode 100755
index 00000000..365b26ee
--- /dev/null
+++ b/profiles/ManuSurface/Arch/install.fish
@@ -0,0 +1,5 @@
+#!/bin/env fish
+begin
+    set -l dir (status dirname)
+    source "$dir/../../../scripts/Arch/OS/install.fish"
+end
diff --git a/profiles/ManuSurface/Arch/setup.fish b/profiles/ManuSurface/Arch/setup.fish
index 952603dd..5f5d201d 100755
--- a/profiles/ManuSurface/Arch/setup.fish
+++ b/profiles/ManuSurface/Arch/setup.fish
@@ -8,7 +8,7 @@ begin
     end
 
     function getInstallerScript -V dir -S
-        echo "$dir/install.sh"
+        echo "$dir/install.fish"
     end
 
     CONFIG_MODULE="$(status dirname)/config.nix" \
diff --git a/scripts/Arch/OS/install.fish b/scripts/Arch/OS/install.fish
new file mode 100644
index 00000000..314c518d
--- /dev/null
+++ b/scripts/Arch/OS/install.fish
@@ -0,0 +1,3 @@
+#!/bin/env fish
+set -l dir (status dirname)
+source "$dir/../../Common/OS/install.fish"
diff --git a/scripts/Common/OS/install.fish b/scripts/Common/OS/install.fish
new file mode 100644
index 00000000..dc9d063b
--- /dev/null
+++ b/scripts/Common/OS/install.fish
@@ -0,0 +1,36 @@
+#!/bin/env fish
+set -l dir (status dirname)
+source "$dir/../Scripts/config.fish"
+source "$dir/../Scripts/hooks.fish"
+
+function copyNixConfig -V dir
+    set -l configFile ~/.config/nix/nix.conf
+    mkdir -p (dirname "$configFile")
+    cp "$dir/../../../archiso/airootfs/root/.config/nix/nix.conf" "$configFile"
+end
+
+if [ (id -u) -eq 0 ]
+    set -l name (getConfig valhalla.setupUser.name)
+    set -l sudoConfig "/etc/sudoers.d/PortValhalla"
+
+    runHook createUser || \
+        begin
+            useradd \
+                --comment "PortValhalla setup user" \
+                --system \
+                --no-user-group \
+                --groups wheel \
+                --create-home \
+                --uid (getConfig valhalla.setupUser.id --json) \
+                "$name"
+        end
+
+    and begin
+        echo "$name ALL=(ALL:ALL) NOPASSWD: ALL"
+    end > "$sudoConfig"
+    
+    and sudo --preserve-env="CONFIG_MODULE" --user "$name" "$INSTALLER_SCRIPT"
+    rm "$sudoConfig"
+else
+    
+end
diff --git a/scripts/Common/OS/setup.fish b/scripts/Common/OS/setup.fish
index 9c64a9cf..c4d53564 100644
--- a/scripts/Common/OS/setup.fish
+++ b/scripts/Common/OS/setup.fish
@@ -22,6 +22,13 @@ begin
     and runHook setupOS || true
     and runHook autologin || true
 
+    # Copy `nixpkgs` channel
+    and begin
+        set -l channelDir /nix/var/nix/profiles/per-user/root/channels/nixpkgs
+        mkdir -p (dirname "$mountDir/$channelDir")
+        cp -r "$channelDir" "$mountDir/$channelDir"
+    end
+
     and begin
         set -l script (string escape (getCloneFile (getInstallerScript)))
         printf %s\n \