diff --git a/common.js b/common.js
index ec83465..9d688ed 100644
--- a/common.js
+++ b/common.js
@@ -47,7 +47,7 @@ function findUbuntuVersion() {
 export function win2nix(path) { 
   if (/^[A-Z]:/i.test(path)) {
     // path starts with drive
-    path = `/${path[0].toLowerCase()}${path.split(':')[1]}`
+    path = `/${path[0].toLowerCase()}${path.split(':', 2)[1]}`
   }
   return path.replace(/\\/g, '/').replace(/ /g, '\\ ')
 }
diff --git a/dist/index.js b/dist/index.js
index ab23906..9e7ea06 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -1571,7 +1571,7 @@ function findUbuntuVersion() {
 function win2nix(path) { 
   if (/^[A-Z]:/i.test(path)) {
     // path starts with drive
-    path = `/${path[0].toLowerCase()}${path.split(':')[1]}`
+    path = `/${path[0].toLowerCase()}${path.split(':', 2)[1]}`
   }
   return path.replace(/\\/g, '/').replace(/ /g, '\\ ')
 }
@@ -3595,8 +3595,7 @@ async function downloadAndExtract(platform, engine, version) {
   await common.measure('Extracting Ruby', async () => {
     if (process.env.ImageOS === 'win16') {
       const tar = '"C:\\Program Files\\Git\\usr\\bin\\tar.exe"'
-      await exec.exec(tar, [ '-xz', '-C', common.win2nix(rubiesDir), '-f',
-        common.win2nix(downloadPath) ])
+      await exec.exec(tar, [ '-xz', '-C', common.win2nix(rubiesDir), '-f', common.win2nix(downloadPath) ])
     } else {
       const tar = platform.startsWith('windows') ? 'C:\\Windows\\system32\\tar.exe' : 'tar'
       await exec.exec(tar, [ '-xz', '-C', rubiesDir, '-f',  downloadPath ])
diff --git a/ruby-builder.js b/ruby-builder.js
index ffda0e5..aafec8f 100644
--- a/ruby-builder.js
+++ b/ruby-builder.js
@@ -37,8 +37,7 @@ async function downloadAndExtract(platform, engine, version) {
   await common.measure('Extracting Ruby', async () => {
     if (process.env.ImageOS === 'win16') {
       const tar = '"C:\\Program Files\\Git\\usr\\bin\\tar.exe"'
-      await exec.exec(tar, [ '-xz', '-C', common.win2nix(rubiesDir), '-f',
-        common.win2nix(downloadPath) ])
+      await exec.exec(tar, [ '-xz', '-C', common.win2nix(rubiesDir), '-f', common.win2nix(downloadPath) ])
     } else {
       const tar = platform.startsWith('windows') ? 'C:\\Windows\\system32\\tar.exe' : 'tar'
       await exec.exec(tar, [ '-xz', '-C', rubiesDir, '-f',  downloadPath ])