diff --git a/examples/full-nixos/arion-pkgs.nix b/examples/full-nixos/arion-pkgs.nix
index d13a605..69aad13 100644
--- a/examples/full-nixos/arion-pkgs.nix
+++ b/examples/full-nixos/arion-pkgs.nix
@@ -1,2 +1,6 @@
 # Instead of pinning Nixpkgs, we can opt to use the one in NIX_PATH
-import <nixpkgs> {}
+import <nixpkgs> {
+  # We specify the architecture explicitly. Use a Linux remote builder when
+  # calling arion from other platforms.
+  system = "x86_64-linux";
+}
diff --git a/examples/minimal/arion-pkgs.nix b/examples/minimal/arion-pkgs.nix
index d13a605..69aad13 100644
--- a/examples/minimal/arion-pkgs.nix
+++ b/examples/minimal/arion-pkgs.nix
@@ -1,2 +1,6 @@
 # Instead of pinning Nixpkgs, we can opt to use the one in NIX_PATH
-import <nixpkgs> {}
+import <nixpkgs> {
+  # We specify the architecture explicitly. Use a Linux remote builder when
+  # calling arion from other platforms.
+  system = "x86_64-linux";
+}
diff --git a/examples/nixos-unit/arion-pkgs.nix b/examples/nixos-unit/arion-pkgs.nix
index d13a605..69aad13 100644
--- a/examples/nixos-unit/arion-pkgs.nix
+++ b/examples/nixos-unit/arion-pkgs.nix
@@ -1,2 +1,6 @@
 # Instead of pinning Nixpkgs, we can opt to use the one in NIX_PATH
-import <nixpkgs> {}
+import <nixpkgs> {
+  # We specify the architecture explicitly. Use a Linux remote builder when
+  # calling arion from other platforms.
+  system = "x86_64-linux";
+}