# Rebuilds fail with interpolation error
**URL:** https://forum.buildkite.community/t/rebuilds-fail-with-interpolation-error/2024
**Category:** General
**Created:** [May 10, 2022, 9:39am UTC](https://forum.buildkite.community/t/rebuilds-fail-with-interpolation-error/2024 "2022-05-10T09:39:15Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@maleadt](https://forum.buildkite.community/u/maleadt)
#### Post date: [May 10, 2022, 9:39am UTC](https://forum.buildkite.community/t/rebuilds-fail-with-interpolation-error/2024/1 "2022-05-10T09:39:15Z")
Hi all,
In [my pipeline](https://github.com/JuliaGPU/CUDA.jl/blob/master/.buildkite/pipeline.yml), I’m using encrypted environment variables to set secrets that can only be decrypted by the agents. That’s been working just fine, but since a couple of weeks/months I’ve been having issues with _rebuilds_. Yes, initial builds work perfectly fine, but as soon as I click the `Rebuild` button in the Buildkite UI I get the following error:
> FATAL Couldn’t upload the “pipeline.yml” pipeline. Refusing to upload pipeline containing the value interpolated from the “SECRET\_CODECOV\_TOKEN” environment variable. Ensure your pipeline does not include secret values or interpolated secret values.
> 🚨 Error: The command exited with status 1
But I’m not actually interpolating this value? Even if I were, that’s perfectly fine, so I don’t get why it started failing because of that (only during rebuilds, at that).
An example of such a build: [https://buildkite.com/julialang/cuda-dot-jl/builds/2866#e2fdf1e2-dcb2-4a94-9673-6ba3f9a56c3e](https://buildkite.com/julialang/cuda-dot-jl/builds/2866#e2fdf1e2-dcb2-4a94-9673-6ba3f9a56c3e). If I force-pushed instead, the build just kicked of normally: [https://buildkite.com/julialang/cuda-dot-jl/builds/2867](https://buildkite.com/julialang/cuda-dot-jl/builds/2867). I’d say this looks like a Buildkite bug, or am I doing something wrong?
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### Author:  [@paula](https://forum.buildkite.community/u/paula)
#### Post date: [May 10, 2022, 3:12pm UTC](https://forum.buildkite.community/t/rebuilds-fail-with-interpolation-error/2024/2 "2022-05-10T15:12:08Z")
Hey @maleadt!
Which agent version are you using? We introduced a change on agent v.3.34.0 so that the `buildkite-agent pipeline upload` command would reject any pipeline yaml that had sensitive values in it.
We consider this a great security feature, but unfortunately, it’s a breaking change, and we accidentally shipped it as part of a minor release.
We fixed it on [v.3.34.1](https://github.com/buildkite/agent/releases/tag/v3.34.1).
Hope this helps!
Best,
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### Author:  [@maleadt](https://forum.buildkite.community/u/maleadt)
#### Post date: [May 12, 2022, 10:55am UTC](https://forum.buildkite.community/t/rebuilds-fail-with-interpolation-error/2024/3 "2022-05-12T10:55:44Z")
Ah yes, we’re using v3.34.0. I’ll try upgrading.
Although I get that this is a useful security feature, the fact that it only happens _when rebuilding_ does seem to imply it’s slightly buggy (apart from the breaking part)?