diff --git a/Makefile b/Makefile
index 8e2dc3a9..c6beb85f 100644
--- a/Makefile
+++ b/Makefile
@@ -218,6 +218,8 @@ check:
 	@GOARCH=wasm GOOS=js go build ./...
 # Ensure we build on gojs. See #1526.
 	@GOARCH=wasm GOOS=wasip1 go build ./...
+# Ensure we build on aix. See #1723
+	@GOARCH=ppc64 GOOS=aix go build ./...
 # Ensure we build on windows:
 	@GOARCH=amd64 GOOS=windows go build ./...
 # Ensure we build on an arbitrary operating system:
diff --git a/experimental/sys/syscall_errno.go b/experimental/sys/syscall_errno.go
index d28f6faa..ea511ec2 100644
--- a/experimental/sys/syscall_errno.go
+++ b/experimental/sys/syscall_errno.go
@@ -1,4 +1,4 @@
-//go:build !plan9
+//go:build !plan9 && !aix
 
 package sys
 
diff --git a/experimental/sys/syscall_errno_plan9.go b/experimental/sys/syscall_errno_unsupported.go
similarity index 75%
rename from experimental/sys/syscall_errno_plan9.go
rename to experimental/sys/syscall_errno_unsupported.go
index 0e454f0a..1c6d423d 100644
--- a/experimental/sys/syscall_errno_plan9.go
+++ b/experimental/sys/syscall_errno_unsupported.go
@@ -1,3 +1,5 @@
+//go:build plan9 || aix
+
 package sys
 
 func syscallToErrno(err error) (Errno, bool) {