diff --git a/index.js b/index.js
index 60ca7ba..b91b221 100644
--- a/index.js
+++ b/index.js
@@ -41,8 +41,8 @@ function spawnNpmWithOutput(args, options) {
   });
 }
 
-async function packWithNpm({ sourceDir, targetDir, verbose }) {
-  const output = (await spawnNpmWithOutput(['pack', sourceDir], {
+async function packWithNpm({ packageSpec, targetDir, verbose }) {
+  const output = (await spawnNpmWithOutput(['pack', packageSpec], {
     cwd: targetDir,
     verbose
   })).trim().split(/\n/);
@@ -60,7 +60,7 @@ async function packWithNpm({ sourceDir, targetDir, verbose }) {
   }
 }
 
-async function publish({tag, branch, version, push, packOptions}, pack = packWithNpm) {
+async function publish({tag, branch, version, push, packageSpec, packOptions}, pack = packWithNpm) {
   if (!tag) {
     tag = `v${version}`;
   }
@@ -86,7 +86,7 @@ async function publish({tag, branch, version, push, packOptions}, pack = packWit
     }
 
     await pack(Object.assign({
-      sourceDir: process.cwd(),
+      packageSpec: packageSpec,
       targetDir: tmpDir,
     }, packOptions));
 
diff --git a/main.js b/main.js
index 8b3aa38..b92b6e3 100644
--- a/main.js
+++ b/main.js
@@ -12,6 +12,8 @@ const argv = yargs
   .describe('branch', "Branch name to append this new release to - none by default")
   .describe('push', 'Push update to the git remote (pass --no-push to disable)')
   .describe('force', 'Override any existing tag on the remote as well as locally (git tag -f, git push -f)')
+  .parserConfiguration({ 'populate--': true })
+  .describe('--', 'All arguments after -- are passed to npm pack command')
   .boolean('push')
   .boolean('force')
   .default('push', 'true')
@@ -21,6 +23,16 @@ const argv = yargs
 const path = require('path');
 const packageJson = require(path.join(process.cwd(), '/package.json'));
 
+// packageSpec is the first non-option token after `--`.
+// Remaining forwarded tokens are forwarded.
+const forwarded = yargs(argv['--'] || [])
+  .default('verbose', 'true')
+  .wrap(yargs.terminalWidth())
+  .argv;
+
+const packageSpec = forwarded._.length > 0 ? forwarded._ : process.cwd();
+console.log('Using packageSpec:', packageSpec);
+
 publish({
   tag: argv.tag,
   branch: argv.branch,
@@ -30,8 +42,9 @@ publish({
     remote: argv.remote,
     force: argv.force,
   },
+  packageSpec,
   packOptions: {
-    verbose: true
+    ...forwarded
   }
 }).catch(err => {
   if (err.cmd) {