diff --git a/src/cli.ts b/src/cli.ts
index d959369..dc2a67c 100755
--- a/src/cli.ts
+++ b/src/cli.ts
@@ -1,11 +1,12 @@
-#!/usr/bin/env -S deno run --no-npm --no-prompt --allow-read=. --allow-write=.
+#!/usr/bin/env -S deno run --no-prompt --allow-read=. --allow-write=lib/
+import { existsSync } from "node:fs";
 import { ts } from "./deps.deno.ts";
 import { getHelpText } from "./help.ts";
 import { getVersion, initializeProject } from "./init.ts";
 import { Context, deno2node, emit } from "./mod.ts";
 
 const { options, fileNames, errors } = ts.parseCommandLine(Deno.args);
-const tsConfigFilePath = options.project ?? fileNames[0] ?? "tsconfig.json";
+const tsConfigFilePath = options.project ?? ts.findConfigFile(".", existsSync);
 
 if (errors.length) {
   for (const error of errors) {
@@ -30,11 +31,26 @@ if (options.init) {
   Deno.exit(0);
 }
 
-console.time("Loading tsconfig");
-const ctx = new Context({ tsConfigFilePath, compilerOptions: options });
-console.timeEnd("Loading tsconfig");
+const ctx = new Context({
+  tsConfigFilePath,
+  compilerOptions: options,
+  skipAddingFilesFromTsConfig: true,
+});
+
+console.time("Loading source files");
+if (fileNames.length) {
+  ctx.project.addSourceFilesAtPaths(fileNames);
+} else if (tsConfigFilePath) {
+  ctx.project.addSourceFilesFromTsConfig(tsConfigFilePath);
+} else {
+  console.error("Specify entry points.");
+  Deno.exit(2);
+}
+ctx.project.resolveSourceFileDependencies();
+console.timeEnd("Loading source files");
+
+deno2node(ctx);
 
-await deno2node(ctx);
 console.time("Emitting");
 const diagnostics = await emit(ctx.project);
 console.timeEnd("Emitting");
diff --git a/src/deno2node.ts b/src/deno2node.ts
index 390367a..0a54e91 100644
--- a/src/deno2node.ts
+++ b/src/deno2node.ts
@@ -1,24 +1,8 @@
-// based on https://github.com/dsherret/code-block-writer/blob/99454249cd13bd89befa45ac815b37b3e02896f5/scripts/build_npm.ts
-
-import { Context } from "./context.ts";
-import { Node, SourceFile } from "./deps.deno.ts";
-import { transpileSpecifier } from "./_transformations/specifiers.ts";
-import { vendorEverything } from "./_transformations/vendor.ts";
 import { shimEverything } from "./_transformations/shim.ts";
-
-function transpileImportSpecifiers(sourceFile: SourceFile) {
-  for (const statement of sourceFile.getStatements()) {
-    if (
-      Node.isImportDeclaration(statement) ||
-      Node.isExportDeclaration(statement)
-    ) {
-      const modSpecifierValue = statement.getModuleSpecifierValue();
-      if (modSpecifierValue !== undefined) {
-        statement.setModuleSpecifier(transpileSpecifier(modSpecifierValue));
-      }
-    }
-  }
-}
+import { transpileSpecifiers } from "./_transformations/specifiers.ts";
+import { vendorEverything } from "./_transformations/vendor.ts";
+import { type Context } from "./context.ts";
+import { type SourceFile } from "./deps.deno.ts";
 
 const isDenoSpecific = (sourceFile: SourceFile) =>
   sourceFile.getBaseNameWithoutExtension().toLowerCase().endsWith(".deno");
@@ -28,20 +12,20 @@ const isDenoSpecific = (sourceFile: SourceFile) =>
  *
  * 1. Changes import specifiers to be Node-friendly:
  *    - changes extension in relative specifiers to `.js`,
- *    - replaces some `https://` imports with bare specifiers.
+ *    - replaces `npm:` imports with bare specifiers.
  *
  * 2. Changes `*.deno.js` imports specifiers to `*.node.js`
  *    (`import './deps.deno.ts'` -> `import './deps.node.js'`).
  *    This can be used for re-exporting dependencies
  *    and other runtime-specific code.
  *
- * 3. Rewrites remaining https: imports to point
+ * 3. Rewrites remaining `https:` imports to point
  *    into `vendorDir`, if specified:
  *    ```json
- *    // @filename: tsconfig.json
+ *    //@filename: tsconfig.json
  *    {
  *      "deno2node": {
- *        "vendorDir": "src/.deno2node/vendor/"
+ *        "vendorDir": "src/vendor/" // path within `rootDir`
  *      }
  *    }
  *    ```
@@ -49,7 +33,7 @@ const isDenoSpecific = (sourceFile: SourceFile) =>
  * 4. Imports Node.js shims for Deno globals
  *    from [shim file], if specified:
  *    ```json
- *    // @filename: tsconfig.json
+ *    //@filename: tsconfig.json
  *    {
  *      "deno2node": {
  *        "shim": "src/shim.node.ts"
@@ -57,18 +41,19 @@ const isDenoSpecific = (sourceFile: SourceFile) =>
  *    }
  *    ```
  *
- * [shim file]: https://github.com/wojpawlik/deno2node/blob/main/src/shim.node.ts
+ * [shim file]: https://github.com/fromdeno/deno2node/blob/main/src/shim.node.ts
  */
-export async function deno2node(ctx: Context): Promise<void> {
+export function deno2node(ctx: Context): void {
   console.time("Basic transformations");
   for (const sourceFile of ctx.project.getSourceFiles()) {
     if (isDenoSpecific(sourceFile)) {
       ctx.project.removeSourceFile(sourceFile);
       continue;
     }
-    transpileImportSpecifiers(sourceFile);
+    transpileSpecifiers(sourceFile);
   }
   console.timeEnd("Basic transformations");
-  await vendorEverything(ctx);
+
+  vendorEverything(ctx);
   shimEverything(ctx);
 }