diff --git a/internal/cmd/lipsenq/generate/layer_sequences.go b/internal/cmd/lipsenq/generate/layer_sequences.go
index 1103fa1..2ecb28f 100755
--- a/internal/cmd/lipsenq/generate/layer_sequences.go
+++ b/internal/cmd/lipsenq/generate/layer_sequences.go
@@ -6,6 +6,7 @@ import (
 	"io/ioutil"
 	"strconv"
 	"strings"
+	"time"
 
 	"github.com/pkg/errors"
 
@@ -24,9 +25,12 @@ const (
 )
 
 var (
-	goGenTmp = `
-// Auto generated by lipsenq
+	goGenTmp = `// Auto generated
+// By: tildegit.org/PigeonProtocolConsortium/pigeongo/internal/cmd/lipsenq
+// On: %s
+
 package %s
+
 var GeneratedLipmaaLayerSequences = []uint{%v}
 `
 	seqConf = struct {
@@ -59,6 +63,7 @@ var GeneratedLipmaaLayerSequences = []uint{%v}
 				}
 				goGenTmp := fmt.Sprintf(
 					goGenTmp,
+					time.Now().UTC(),
 					seqConf.GoGenPackageName, strings.Join(seqStr, ","),
 				)
 				if seqConf.FilePath == "" {
diff --git a/internal/codec/lipmaa_gen.go b/internal/codec/lipmaa_gen.go
index 82733e5..08d8253 100644
--- a/internal/codec/lipmaa_gen.go
+++ b/internal/codec/lipmaa_gen.go
@@ -2,4 +2,4 @@
 
 package codec
 
-//go:generate go run tildegit.org/PigeonProtocolConsortium/pigeongo/internal/cmd/lipsenq generate sequences -d 41 -f go-generate -g codec -o ./internal/codec/lipmaa_sequences.gen.go
+//go:generate go run tildegit.org/PigeonProtocolConsortium/pigeongo/internal/cmd/lipsenq generate sequences -d 41 -f go-generate -g codec > ./internal/codec/lipmaa_sequences.gen.go
diff --git a/internal/codec/lipmaa_sequences.gen.go b/internal/codec/lipmaa_sequences.gen.go
new file mode 100644
index 0000000..46abeae
--- /dev/null
+++ b/internal/codec/lipmaa_sequences.gen.go
@@ -0,0 +1,7 @@
+// Auto generated
+// By: tildegit.org/PigeonProtocolConsortium/pigeongo/internal/cmd/lipsenq
+// On: 2020-04-19 04:30:19.6331595 +0000 UTC
+
+package codec
+
+var GeneratedLipmaaLayerSequences = []uint{0,1,4,13,40,121,364,1093,3280,9841,29524,88573,265720,797161,2391484,7174453,21523360,64570081,193710244,581130733,1743392200,5230176601,15690529804,47071589413,141214768240,423644304721,1270932914164,3812798742493,11438396227480,34315188682441,102945566047324,308836698141973,926510094425920,2779530283277761,8338590849833284,25015772549499853,75047317648499560,225141952945498681,675425858836496044,2026277576509488133,6078832729528464400}