diff --git a/Dockerfile b/Dockerfile
index 699e67c..086c852 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,9 +9,12 @@ COPY out.js out
 COPY shared.js shared.js
 COPY package.json package.json
 
-# TODO: Clean out cached data that apt generates.  See how sonatype/nexus does it.
-RUN apt-get update & \
-    apt-get install subversion & \
+RUN apt-get update --yes && \
+    apt-get install --yes \
+    	    subversion \
+	    locales locales-all && \
+    apt-get autoremove --yes && \
+    apt-get clean --yes && \
     npm install --quiet
 
 RUN chmod a+x check in out
diff --git a/in.js b/in.js
index 9eed83a..34001b1 100644
--- a/in.js
+++ b/in.js
@@ -67,7 +67,16 @@ process.stdin.on("data", stdin => {
     
     // TODO: urlencode
     cmdLine += ' "' + repository + '" .';
-    exec(cmdLine, {cwd: destDir}, (err, stdout, stderr) => {
+    let options = {
+	cwd: destDir,
+	maxBuffer: 8192*1024,
+	env: {
+	    LANG: "en_US.UTF-8",
+	    LANGUAGE: "en_US:en",
+	    LC_ALL: "en_US.UTF-8"
+	}
+    };
+    exec(cmdLine, options, (err, stdout, stderr) => {
         // TODO: We can generate an incredible amount of output for large repos.
         //  Stream this and check each line as it passes.
         if (stderr && stderr !== "") {
@@ -92,7 +101,7 @@ process.stdin.on("data", stdin => {
             fail(new Error('unexpected svn output.  expected revision, got "' + lines.slice(lines.length - 5).join("\n") + '"'), cmdLine);
         }
         
-        const rev = revLine.substr(header.length, revLine.length - header.length - 2);
+        const rev = revLine.substr(header.length, revLine.length - header.length - 1);
         success({
             "version": {
                 "revision": rev