diff --git a/src/apk_database.h b/src/apk_database.h
index 88107d3..f0f6ba5 100644
--- a/src/apk_database.h
+++ b/src/apk_database.h
@@ -101,6 +101,7 @@ struct apk_name {
 	unsigned is_dependency : 1;
 	unsigned auto_select_virtual: 1;
 	unsigned priority : 2;
+	unsigned layer : 4;
 	unsigned int foreach_genid;
 	union {
 		struct apk_solver_name_state ss;
diff --git a/src/apk_package.h b/src/apk_package.h
index e7e0a53..8d9cba4 100644
--- a/src/apk_package.h
+++ b/src/apk_package.h
@@ -48,6 +48,7 @@ struct apk_dependency {
 	unsigned conflict : 1;
 	unsigned result_mask : 4;
 	unsigned fuzzy : 1;
+	unsigned layer : 4; // solver sets for 'world' dependencies only
 };
 APK_ARRAY(apk_dependency_array, struct apk_dependency);
 
@@ -120,6 +121,8 @@ void apk_blob_push_deps(apk_blob_t *to, struct apk_database *, struct apk_depend
 void apk_blob_pull_dep(apk_blob_t *from, struct apk_database *, struct apk_dependency *);
 void apk_blob_pull_deps(apk_blob_t *from, struct apk_database *, struct apk_dependency_array **);
 
+int apk_deps_write_layer(struct apk_database *db, struct apk_dependency_array *deps,
+			 struct apk_ostream *os, apk_blob_t separator, unsigned layer);
 int apk_deps_write(struct apk_database *db, struct apk_dependency_array *deps,
 		   struct apk_ostream *os, apk_blob_t separator);
 
diff --git a/src/database.c b/src/database.c
index 781cf99..1e674d7 100644
--- a/src/database.c
+++ b/src/database.c
@@ -1819,11 +1819,16 @@ static int apk_db_write_layers(struct apk_database *db)
 		ld->installed = apk_ostream_to_file(ld->fd, "installed", 0644);
 		ld->scripts   = apk_ostream_to_file(ld->fd, "scripts.tar", 0644);
 		ld->triggers  = apk_ostream_to_file(ld->fd, "triggers", 0644);
-	}
 
-	os = apk_ostream_to_file(db->root_fd, apk_world_file, 0644);
-	if (!IS_ERR(os)) {
-		apk_deps_write(db, db->world, os, APK_BLOB_PTR_LEN("\n", 1));
+		if (i == 0)
+			os = apk_ostream_to_file(db->root_fd, apk_world_file, 0644);
+		else
+			os = apk_ostream_to_file(ld->fd, "world", 0644);
+		if (IS_ERR(os)) {
+			if (!rr) rr = PTR_ERR(os);
+			continue;
+		}
+		apk_deps_write_layer(db, db->world, os, APK_BLOB_PTR_LEN("\n", 1), i);
 		apk_ostream_write(os, "\n", 1);
 		r = apk_ostream_close(os);
 		if (!rr) rr = r;
diff --git a/src/package.c b/src/package.c
index eef5dd5..cc86192 100644
--- a/src/package.c
+++ b/src/package.c
@@ -423,7 +423,7 @@ void apk_blob_push_deps(apk_blob_t *to, struct apk_database *db, struct apk_depe
 	}
 }
 
-int apk_deps_write(struct apk_database *db, struct apk_dependency_array *deps, struct apk_ostream *os, apk_blob_t separator)
+int apk_deps_write_layer(struct apk_database *db, struct apk_dependency_array *deps, struct apk_ostream *os, apk_blob_t separator, unsigned layer)
 {
 	apk_blob_t blob;
 	char tmp[256];
@@ -433,9 +433,10 @@ int apk_deps_write(struct apk_database *db, struct apk_dependency_array *deps, s
 		return 0;
 
 	for (i = 0; i < deps->num; i++) {
+		if (layer != -1 && deps->item[i].layer != layer) continue;
+
 		blob = APK_BLOB_BUF(tmp);
-		if (i)
-			apk_blob_push_blob(&blob, separator);
+		if (n) apk_blob_push_blob(&blob, separator);
 		apk_blob_push_dep(&blob, db, &deps->item[i]);
 
 		blob = apk_blob_pushed(APK_BLOB_BUF(tmp), blob);
@@ -449,6 +450,11 @@ int apk_deps_write(struct apk_database *db, struct apk_dependency_array *deps, s
 	return n;
 }
 
+int apk_deps_write(struct apk_database *db, struct apk_dependency_array *deps, struct apk_ostream *os, apk_blob_t separator)
+{
+	return apk_deps_write_layer(db, deps, os, separator, -1);
+}
+
 void apk_dep_from_adb(struct apk_dependency *dep, struct apk_database *db, struct adb_obj *d)
 {
 	*dep = (struct apk_dependency) {
diff --git a/src/solver.c b/src/solver.c
index 2ea7f3f..3283659 100644
--- a/src/solver.c
+++ b/src/solver.c
@@ -1093,6 +1093,11 @@ restart:
 		goto restart;
 	}
 
+	foreach_array_item(d, world) {
+		if (!d->name->ss.chosen.pkg) continue;
+		d->layer = d->name->ss.chosen.pkg->layer;
+	}
+
 	apk_hash_foreach(&db->available.names, free_name, NULL);
 	apk_hash_foreach(&db->available.packages, free_package, NULL);
 	dbg_printf("solver done, errors=%d\n", ss->errors);