diff --git a/internal/app/app_stub_test.go b/internal/app/app_stub_test.go
index 1b6d578..89804d2 100644
--- a/internal/app/app_stub_test.go
+++ b/internal/app/app_stub_test.go
@@ -3,6 +3,7 @@ package app_test
 import (
 	"fmt"
 	"io/fs"
+	"log"
 	"os/user"
 	"strconv"
 
@@ -23,6 +24,9 @@ func (s *stubNixOS) Exit(code int)                            { panic("called ex
 func (s *stubNixOS) EvalSymlinks(path string) (string, error) { return path, nil }
 func (s *stubNixOS) Uid(aid int) (int, error)                 { return 1000000 + 0*10000 + aid, nil }
 
+func (s *stubNixOS) Println(v ...any)               { log.Println(v...) }
+func (s *stubNixOS) Printf(format string, v ...any) { log.Printf(format, v...) }
+
 func (s *stubNixOS) LookupEnv(key string) (string, bool) {
 	switch key {
 	case "SHELL":
diff --git a/internal/sys/interface.go b/internal/sys/interface.go
index 80a07ae..da1cf07 100644
--- a/internal/sys/interface.go
+++ b/internal/sys/interface.go
@@ -34,6 +34,9 @@ type State interface {
 	// Exit provides [os.Exit].
 	Exit(code int)
 
+	Println(v ...any)
+	Printf(format string, v ...any)
+
 	// Paths returns a populated [Paths] struct.
 	Paths() Paths
 	// Uid invokes fsu and returns target uid.
diff --git a/internal/sys/std.go b/internal/sys/std.go
index c722859..88579f6 100644
--- a/internal/sys/std.go
+++ b/internal/sys/std.go
@@ -41,6 +41,8 @@ func (s *Std) Stat(name string) (fs.FileInfo, error)        { return os.Stat(nam
 func (s *Std) Open(name string) (fs.File, error)            { return os.Open(name) }
 func (s *Std) EvalSymlinks(path string) (string, error)     { return filepath.EvalSymlinks(path) }
 func (s *Std) Exit(code int)                                { internal.Exit(code) }
+func (s *Std) Println(v ...any)                             { fmsg.Verbose(v...) }
+func (s *Std) Printf(format string, v ...any)               { fmsg.Verbosef(format, v...) }
 
 const xdgRuntimeDir = "XDG_RUNTIME_DIR"