diff --git a/.appveyor.yml b/.appveyor.yml
index 0c9de3ac..07a72738 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -31,15 +31,15 @@ branches:
 
 before_deploy:
   - move target\release\tree-sitter.exe tree-sitter.exe
-  - 7z a tree-sitter-windows-%PLATFORM%.zip tree-sitter.exe
-  - appveyor PushArtifact tree-sitter-windows-%PLATFORM%.zip
+  - 7z a -tgzip tree-sitter-windows-%PLATFORM%.gz tree-sitter.exe
+  - appveyor PushArtifact tree-sitter-windows-%PLATFORM%.gz
 
 deploy:
   description: ''
   provider: GitHub
   auth_token:
     secure: VC9ntV5+inKoNteZyLQksKzWMKXF46P+Jx3JHKVSfF+o1rWtZn2iIHAVsQv5LaUi
-  artifact: /tree-sitter-windows-.*.zip/
+  artifact: /tree-sitter-windows-.*/
   draft: true
   force_update: true
   on:
diff --git a/.gitignore b/.gitignore
index 23c82fe6..bcb55844 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,11 +1,17 @@
 log.html
+
 .idea
 *.xcodeproj
-*.a
-*.o
+
 fuzz-results
+
 test/fixtures/grammars/*
 !test/fixtures/grammars/.gitkeep
 
 /target
-**/*.rs.bk
+*.rs.bk
+*.a
+*.o
+*.obj
+*.exp
+*.lib
diff --git a/.travis.yml b/.travis.yml
index 55fc9276..722a4dc9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,15 +22,15 @@ branches:
   - /\d+\.\d+\.\d+/
 
 before_deploy:
-  - mv target/release/tree-sitter .
-  - tar czf tree-sitter-${TRAVIS_OS_NAME}-x64.tar.gz tree-sitter
+  - cp target/release/tree-sitter .
+  - gzip --suffix "-${TRAVIS_OS_NAME}-x64.gz" tree-sitter
 
 deploy:
   provider: releases
   api_key:
     secure: "cAd2mQP+Q55v3zedo5ZyOVc3hq3XKMW93lp5LuXV6CYKYbIhkyfym4qfs+C9GJQiIP27cnePYM7B3+OMIFwSPIgXHWWSsuloMtDgYSc/PAwb2dZnJqAyog3BohW/QiGTSnvbVlxPF6P9RMQU6+JP0HJzEJy6QBTa4Und/j0jm24="
   file_glob: true
-  file: "tree-sitter-*.tar.gz"
+  file: "tree-sitter-*.gz"
   draft: true
   overwrite: true
   skip_cleanup: true
diff --git a/cli/npm/.gitignore b/cli/npm/.gitignore
index 306613e7..f0475945 100644
--- a/cli/npm/.gitignore
+++ b/cli/npm/.gitignore
@@ -1,4 +1,3 @@
 tree-sitter
 tree-sitter.exe
-*.tar.gz
-*.zip
+*.gz
diff --git a/cli/npm/install.js b/cli/npm/install.js
index 5564ce98..d73c51cb 100755
--- a/cli/npm/install.js
+++ b/cli/npm/install.js
@@ -1,12 +1,11 @@
 #!/usr/bin/env node
 
 const fs = require('fs');
+const zlib = require('zlib');
 const https = require('https');
-const execFileSync = require('child_process').execFileSync;
 const packageJSON = require('./package.json');
 
 // Determine the URL of the file.
-const isWindows = process.platform === 'win32';
 const platformName = {
   'darwin': 'osx',
   'linux': 'linux',
@@ -15,48 +14,41 @@ const platformName = {
 if (!platformName) {
   throw new Error(`Cannot install tree-sitter-cli for platform ${process.platform}`);
 }
+
+const archName = {
+  'x64': 'x64',
+  'x86': 'x86',
+  'ia32': 'x86'
+}[process.arch];
+if (!archName) {
+  throw new Error(`Cannot install tree-sitter-cli for architecture ${process.arch}`);
+}
+
 const releaseURL = `https://github.com/tree-sitter/tree-sitter/releases/download/${packageJSON.version}`;
-const assetExtension = isWindows ? 'zip' : 'tar.gz';
-const assetName = `tree-sitter-${platformName}-${process.arch}.${assetExtension}`;
+const assetName = `tree-sitter-${platformName}-${archName}.gz`;
 const assetURL = `${releaseURL}/${assetName}`;
 
 // Remove previously-downloaded files.
-const executableName = isWindows ? 'tree-sitter.exe' : 'tree-sitter';
+const executableName = process.platform === 'win32' ? 'tree-sitter.exe' : 'tree-sitter';
 if (fs.existsSync(executableName)) {
   fs.unlinkSync(executableName);
 }
-if (fs.existsSync(assetName)) {
-  fs.unlinkSync(assetName);
-}
 
 // Download the compressed file.
 console.log(`Downloading ${assetURL}`);
-const file = fs.createWriteStream(assetName);
+const file = fs.createWriteStream(executableName);
 get(assetURL, response => {
   if (response.statusCode > 299) {
     throw new Error([
       'Download failed',
       '',
-      `url: ${url}`,
+      `url: ${assetURL}`,
       `status: ${response.statusCode}`,
       `headers: ${JSON.stringify(response.headers, null, 2)}`,
       '',
     ].join('\n'));
   }
-
-  response.pipe(file);
-});
-
-// Extract the file.
-file.on('finish', () => {
-  console.log(`Extracting ${assetName}`);
-  if (isWindows) {
-    execFileSync('7z', ['e', assetName]);
-  } else {
-    execFileSync('tar', ['xzf', assetName]);
-  }
-  fs.unlinkSync(assetName);
-  console.log(`Done`);
+  response.pipe(zlib.createGunzip()).pipe(file);
 });
 
 // Follow redirects.
diff --git a/cli/npm/package.json b/cli/npm/package.json
index 01a50491..e459b551 100644
--- a/cli/npm/package.json
+++ b/cli/npm/package.json
@@ -14,7 +14,7 @@
   ],
   "main": "lib/api/index.js",
   "scripts": {
-    "install": "./install.js"
+    "install": "install.js"
   },
   "bin": {
     "tree-sitter": "tree-sitter"