diff --git a/osbase/build/fsspec/utils.go b/osbase/build/fsspec/utils.go
index f5a45e3..b291376 100644
--- a/osbase/build/fsspec/utils.go
+++ b/osbase/build/fsspec/utils.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package fsspec
 
 import (
diff --git a/osbase/build/fwprune/main.go b/osbase/build/fwprune/main.go
index 0bedcfd..791c794 100644
--- a/osbase/build/fwprune/main.go
+++ b/osbase/build/fwprune/main.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // fwprune is a buildsystem utility that filters linux-firmware repository
 // contents to include only files required by the built-in kernel modules,
 // that are specified in modules.builtin.modinfo.
diff --git a/osbase/build/genosrelease/main.go b/osbase/build/genosrelease/main.go
index c4b2a79..8d061f9 100644
--- a/osbase/build/genosrelease/main.go
+++ b/osbase/build/genosrelease/main.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 // genosrelease provides rudimentary support to generate os-release files
 // following the freedesktop spec from arguments and stamping
diff --git a/osbase/build/kconfig-patcher/main.go b/osbase/build/kconfig-patcher/main.go
index 1b5f24f..45288e3 100644
--- a/osbase/build/kconfig-patcher/main.go
+++ b/osbase/build/kconfig-patcher/main.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package main
 
diff --git a/osbase/build/kconfig-patcher/main_test.go b/osbase/build/kconfig-patcher/main_test.go
index 11c7d84..f90c860 100644
--- a/osbase/build/kconfig-patcher/main_test.go
+++ b/osbase/build/kconfig-patcher/main_test.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package main
 
diff --git a/osbase/build/mkcpio/main.go b/osbase/build/mkcpio/main.go
index 000a979..ab946d1 100644
--- a/osbase/build/mkcpio/main.go
+++ b/osbase/build/mkcpio/main.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package main
 
 import (
diff --git a/osbase/build/mkerofs/main.go b/osbase/build/mkerofs/main.go
index 12cde48..26a6689 100644
--- a/osbase/build/mkerofs/main.go
+++ b/osbase/build/mkerofs/main.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 // mkerofs takes a specification in the form of a prototext file (see fsspec
 // next to this) and assembles an EROFS filesystem according to it. The output
diff --git a/osbase/build/mkimage/main.go b/osbase/build/mkimage/main.go
index 5e2b082..79e2920 100644
--- a/osbase/build/mkimage/main.go
+++ b/osbase/build/mkimage/main.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 // mkimage is a tool to generate node disk images.
 // It can be used both to initialize block devices and to create image
diff --git a/osbase/build/mkimage/osimage/osimage.go b/osbase/build/mkimage/osimage/osimage.go
index 2f497a8..71b5499 100644
--- a/osbase/build/mkimage/osimage/osimage.go
+++ b/osbase/build/mkimage/osimage/osimage.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 // This package provides self-contained implementation used to generate
 // Metropolis disk images.
diff --git a/osbase/build/mkpayload/mkpayload.go b/osbase/build/mkpayload/mkpayload.go
index a66d458..c1433f3 100644
--- a/osbase/build/mkpayload/mkpayload.go
+++ b/osbase/build/mkpayload/mkpayload.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 // mkpayload is an objcopy wrapper that builds EFI unified kernel images. It
 // performs actions that can't be realized by either objcopy or the
diff --git a/osbase/build/mkucode/main.go b/osbase/build/mkucode/main.go
index 58561e3..dcce5fb 100644
--- a/osbase/build/mkucode/main.go
+++ b/osbase/build/mkucode/main.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // This assembles standalone microcode files into the format expected by the
 // Linux microcode loader. See
 // https://www.kernel.org/doc/html/latest/x86/microcode.html for further
diff --git a/osbase/build/mkucode/spec/gomod-generated-placeholder.go b/osbase/build/mkucode/spec/gomod-generated-placeholder.go
index f09cd57..ca2145c 100644
--- a/osbase/build/mkucode/spec/gomod-generated-placeholder.go
+++ b/osbase/build/mkucode/spec/gomod-generated-placeholder.go
@@ -1 +1,4 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package spec
diff --git a/osbase/build/mkverity/mkverity.go b/osbase/build/mkverity/mkverity.go
index ff2807b..82db0da 100644
--- a/osbase/build/mkverity/mkverity.go
+++ b/osbase/build/mkverity/mkverity.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 // This package implements a command line tool that creates dm-verity hash
 // images at a selected path, given an existing data image. The tool