diff --git a/build/platforms/BUILD.bazel b/build/platforms/BUILD.bazel
index 293af9b..028bb9a 100644
--- a/build/platforms/BUILD.bazel
+++ b/build/platforms/BUILD.bazel
@@ -1,6 +1,6 @@
-# Generic platform for Linux x86_64 targets.
+# Generic platform for Linux targets.
 platform(
-    name = "linux_amd64",
+    name = "linux_x86_64",
     constraint_values = [
         "@platforms//os:linux",
         "@platforms//cpu:x86_64",
@@ -8,9 +8,18 @@
     visibility = ["//visibility:public"],
 )
 
-# EFI preboot environment for x86_64 machines.
 platform(
-    name = "efi_amd64",
+    name = "linux_aarch64",
+    constraint_values = [
+        "@platforms//os:linux",
+        "@platforms//cpu:aarch64",
+    ],
+    visibility = ["//visibility:public"],
+)
+
+# EFI preboot environment.
+platform(
+    name = "uefi_x86_64",
     constraint_values = [
         "@platforms//os:uefi",
         "@platforms//cpu:x86_64",
@@ -19,10 +28,20 @@
 )
 
 platform(
-    name = "remote_amd64",
+    name = "uefi_aarch64",
     constraint_values = [
-        "@platforms//cpu:x86_64",
+        "@platforms//os:uefi",
+        "@platforms//cpu:aarch64",
+    ],
+    visibility = ["//visibility:public"],
+)
+
+# Remote execution platform.
+platform(
+    name = "remote_x86_64",
+    constraint_values = [
         "@platforms//os:linux",
+        "@platforms//cpu:x86_64",
     ],
     exec_properties = {
         "container-image": "docker://gcr.io/monogon-infra/sandbox",