diff --git a/osbase/blockdev/blockdev.go b/osbase/blockdev/blockdev.go
index 9cf4ee2..a8d55cb 100644
--- a/osbase/blockdev/blockdev.go
+++ b/osbase/blockdev/blockdev.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package blockdev
 
 import (
diff --git a/osbase/blockdev/blockdev_darwin.go b/osbase/blockdev/blockdev_darwin.go
index 725c3a5..46fa1ce 100644
--- a/osbase/blockdev/blockdev_darwin.go
+++ b/osbase/blockdev/blockdev_darwin.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 //go:build darwin
 
 package blockdev
diff --git a/osbase/blockdev/blockdev_linux.go b/osbase/blockdev/blockdev_linux.go
index 7bc31fd..b8fb558 100644
--- a/osbase/blockdev/blockdev_linux.go
+++ b/osbase/blockdev/blockdev_linux.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 //go:build linux
 
 package blockdev
diff --git a/osbase/blockdev/blockdev_linux_test.go b/osbase/blockdev/blockdev_linux_test.go
index 31aa827..9cbf027 100644
--- a/osbase/blockdev/blockdev_linux_test.go
+++ b/osbase/blockdev/blockdev_linux_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 //go:build linux
 
 package blockdev
diff --git a/osbase/blockdev/blockdev_test.go b/osbase/blockdev/blockdev_test.go
index df4e8ae..9fc301a 100644
--- a/osbase/blockdev/blockdev_test.go
+++ b/osbase/blockdev/blockdev_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package blockdev
 
 import (
diff --git a/osbase/blockdev/blockdev_windows.go b/osbase/blockdev/blockdev_windows.go
index 9e3d51c..4541076 100644
--- a/osbase/blockdev/blockdev_windows.go
+++ b/osbase/blockdev/blockdev_windows.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 //go:build windows
 
 package blockdev
diff --git a/osbase/blockdev/memory.go b/osbase/blockdev/memory.go
index cf5e21d..72a3cb9 100644
--- a/osbase/blockdev/memory.go
+++ b/osbase/blockdev/memory.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package blockdev
 
 import (