diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 0000000000000000000000000000000000000000..0a891db7812ea7b036de504a8f5f957fe14d12b4
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,27 @@
+version: 2
+jobs:
+  build:
+    docker:
+      - image: trzeci/emscripten
+      
+    working_directory: ~/repo
+
+    steps:
+      - checkout
+      - run:
+          name: Native Compile
+          command: make
+      - run:
+          name: Native Tests
+          command: make test
+      - run:
+          name: JS Compile
+          command: make js
+      - run:
+          name: Install JS Deps
+          working_directory: ~/repo/javascript
+          command: npm install
+      - run:
+          name: JS Tests
+          working_directory: ~/repo/javascript
+          command: npm run test
diff --git a/Makefile b/Makefile
index 888717277893dd95b43623060de73aec1241b69f..91436ede1602bb32efd6a11ea9779c3d9a7d514f 100644
--- a/Makefile
+++ b/Makefile
@@ -219,7 +219,7 @@ fuzzers: $(FUZZER_BINARIES) $(FUZZER_DEBUG_BINARIES)
 .PHONY: fuzzers
 
 $(JS_EXPORTED_FUNCTIONS): $(PUBLIC_HEADERS)
-	perl -MJSON -ne '$$f{"_$$1"}=1 if /(olm_[^( ]*)\(/; END { @f=sort keys %f; print encode_json \@f }' $^ > $@.tmp
+	./exports.py $^ > $@.tmp
 	mv $@.tmp $@
 
 all: test js lib debug doc
diff --git a/exports.py b/exports.py
new file mode 100755
index 0000000000000000000000000000000000000000..b37cbbb8bf2afffa3f5f3046d32347e13b0bc669
--- /dev/null
+++ b/exports.py
@@ -0,0 +1,18 @@
+#!/usr/bin/env python
+
+import sys
+import re
+import json
+
+expr = re.compile(r"(olm_[^( ]*)\(")
+
+exports = set()
+
+for f in sys.argv[1:]:
+    with open(f) as fp:
+        for line in fp:
+            matches = expr.search(line)
+            if matches is not None:
+                exports.add('_%s' % (matches.group(1),))
+
+json.dump(sorted(exports), sys.stdout)