diff --git a/src/apptask.js b/src/apptask.js
index 08d48aa1b..a7fe7d37f 100644
--- a/src/apptask.js
+++ b/src/apptask.js
@@ -226,7 +226,7 @@ async function downloadImage(manifest) {
 
     if (diskUsage.available < (1024*1024*1024)) throw new BoxError(BoxError.DOCKER_ERROR, `Not enough disk space to pull docker image. available: ${diskUsage.available}`);
 
-    if (manifest.dockerImage.indexOf('file:') === 0) {
+    if (manifest.dockerImage.indexOf('local/') === 0) {
         await docker.buildImage(manifest);
     } else {
         await docker.downloadImage(manifest);
diff --git a/src/docker.js b/src/docker.js
index 1cf256bd0..0fe7bdbf9 100644
--- a/src/docker.js
+++ b/src/docker.js
@@ -163,13 +163,12 @@ async function pullImage(imageRef) {
 async function buildImage(manifest) {
     assert.strictEqual(typeof manifest, 'object');
 
-    const sourceArchivePath = manifest.dockerImage.slice('file:'.length);
-    const imageTag = `local/${manifest.id}:${manifest.version}`;
+    const sourceArchivePath = '/tmp/' + manifest.dockerImage.slice('local/'.length);
 
-    debug(`buildImage: building ${imageTag} from ${sourceArchivePath}`);
+    debug(`buildImage: building ${manifest.dockerImage} from ${sourceArchivePath}`);
 
     const tarStream = fs.createReadStream(sourceArchivePath);
-    const [error, stream] = await safe(gConnection.buildImage(tarStream, { t: imageTag }));
+    const [error, stream] = await safe(gConnection.buildImage(tarStream, { t: manifest.dockerImage }));
     if (error) throw new BoxError(BoxError.DOCKER_ERROR, `Unable to build image from ${sourceArchivePath}: ${error.message}`);
 
     return new Promise((resolve, reject) => {
@@ -191,16 +190,14 @@ async function buildImage(manifest) {
                 debug(`buildImage: error ${buildError}`);
                 return reject(new BoxError(buildError.message.includes('no space') ? BoxError.FS_ERROR : BoxError.DOCKER_ERROR, buildError.message));
             } else {
-                debug(`buildImage: success ${imageTag}`);
+                debug(`buildImage: success ${manifest.dockerImage}`);
             }
 
-            // TODO we should probably use that scheme directly instead of file:....
-            manifest.dockerImage = imageTag;
             resolve();
         });
 
         stream.on('error', (error) => {
-            debug(`buildImage: error building image ${imageTag}: %o`, error);
+            debug(`buildImage: error building image ${manifest.dockerImage}: %o`, error);
             reject(new BoxError(BoxError.DOCKER_ERROR, error.message));
         });
     });
diff --git a/src/routes/apps.js b/src/routes/apps.js
index 9485754ac..821c13fe5 100644
--- a/src/routes/apps.js
+++ b/src/routes/apps.js
@@ -207,7 +207,11 @@ async function install(req, res, next) {
     data.manifest = result.manifest;
 
     // if we have a source archive upload, craft a custom docker image URI for later
-    if (req.files.sourceArchive?.path) data.manifest.dockerImage = 'file:' + req.files.sourceArchive.path;
+    if (req.files.sourceArchive?.path) {
+        const newFileName = `${data.manifest.id}:${data.manifest.version}-${Date.now()}`;
+        if (!safe.fs.renameSync(req.files.sourceArchive?.path, `/tmp/${newFileName}`)) return next(new HttpError(500, 'unable to move source archive'));
+        data.manifest.dockerImage = `local/${newFileName}`;
+    }
 
     [error, result] = await safe(apps.install(data, AuditSource.fromRequest(req)));
     if (error) return next(BoxError.toHttpError(error));