diff --git a/packages/lsys/src/index.ts b/packages/lsys/src/index.ts
index 63a03d0594..1d98180dfb 100644
--- a/packages/lsys/src/index.ts
+++ b/packages/lsys/src/index.ts
@@ -1,10 +1,15 @@
-import { Fn2, IObjectOf } from "@thi.ng/api";
 import { partial, threadLast } from "@thi.ng/compose";
 import { illegalState } from "@thi.ng/errors";
 import { cossin, HALF_PI } from "@thi.ng/math";
 import { IRandom, SYSTEM } from "@thi.ng/random";
-import { iterate, last, mapcat, take } from "@thi.ng/transducers";
+import {
+    iterate,
+    last,
+    mapcat,
+    take
+} from "@thi.ng/transducers";
 import { add, Vec } from "@thi.ng/vectors";
+import type { Fn2, IObjectOf } from "@thi.ng/api";
 
 export type LSysSymbol = string | number;
 export type ProductionRules = IObjectOf<