Cloud Container Builder, ZIP does not support timestamps before 1980

Question

I'm trying the following tutorial.

Automatic serverless deployments with Cloud Source Repositories and Container Builder

But I got the error below.

$ gcloud container builds submit --config deploy.yaml .

BUILD
Already have image (with digest): gcr.io/cloud-builders/gcloud
ERROR: (gcloud.beta.functions.deploy) Error creating a ZIP archive with the source code for directory .: ZIP does not support timestamps before 1980
ERROR
ERROR: build step 0 "gcr.io/cloud-builders/gcloud" failed: exit status 1

I'm now trying to solve it. Do you have any idea? My gcloud is the latest version.

$ gcloud -v
Google Cloud SDK 193.0.0
app-engine-go 
app-engine-python 1.9.67
beta 2017.09.15
bq 2.0.30
core 2018.03.09
gsutil 4.28

Sample google cloud function code on the tutorial.

#index.js
exports.f = function(req, res) {
  res.send("hello, gcf!");
};

#deploy.yaml
steps:
- name: gcr.io/cloud-builders/gcloud
  args:
  - beta
  - functions
  - deploy
  - --trigger-http
  - --source=.
  - --entry-point=f
  - hello-gcf # Function name

#deploying without Cloud Container Builder is fine.
gcloud beta functions deploy --trigger-http --source=. --entry-point=f hello-gcf

Answer 1

Container Builder tars your source folder. Maybe something in your . directory has corrupted dates? That's why moving it to the source folder fixes it.