diff --git a/application.go b/application.go
index f7d905a..7712f0c 100644
--- a/application.go
+++ b/application.go
@@ -1,7 +1,9 @@
 package nasin
 
+import "log"
 import "image"
 import "git.tebibyte.media/tomo/tomo"
+import "git.tebibyte.media/tomo/nasin/internal/registry"
 
 // Application represents an application object.
 type Application interface {
@@ -74,9 +76,13 @@ type ApplicationRole string; const (
 	RoleChecklist         ApplicationRole = "Checklist"
 )
 
-// RunApplication is like Run, but runs an application.
-func RunApplication (application Application) error {
-	return tomo.Run(application.Init)
+// RunApplication is like tomo.Run, but runs an application. If something fails
+// to initialize, an error is written to the standard logger.
+func RunApplication (application Application) {
+	err := registry.Init()
+	if err != nil { log.Fatal("nasin: could not init registry:", err) }
+	err := tomo.Run(application.Init)
+	if err != nil { log.Fatal("nasin: could not run application:", err) }
 }
 
 // NewApplicationWindow creates a window for an application. It will
diff --git a/internal/registry/doc.go b/internal/registry/doc.go
new file mode 100644
index 0000000..97bff0c
--- /dev/null
+++ b/internal/registry/doc.go
@@ -0,0 +1,2 @@
+// Package registry provides platform-dependent components at compile time.
+package registry
diff --git a/backend.go b/internal/registry/registry_unix.go
similarity index 57%
rename from backend.go
rename to internal/registry/registry_unix.go
index a7e97ae..b0a0bf6 100644
--- a/backend.go
+++ b/internal/registry/registry_unix.go
@@ -1,8 +1,10 @@
-package nasin
+//go:build unix && (!darwin)
+package registry
 
 import "git.tebibyte.media/tomo/x"
 import "git.tebibyte.media/tomo/tomo"
 
-func init () {
+func Init () error {
 	tomo.Register(1, x.NewBackend)
+	return nil
 }