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<@UCZGDUBDJ> this is saying that the azure plugin failed to install into `~/.pulumi` (_e.g._), you might be able to fix it by blowing away `node_modules` and then re-installing all your dependencies

Oh, apparently we made the plugin loader more strict cc <@UB27BHS4B>

Yes, currently tracking <https://github.com/pulumi/pulumi-azure/issues/200>.

To get unblocked you can 1) set the environment variable `PULUMI_ENABLE_LEGACY_PLUGIN_SEARCH=1` to fall back to the old behavior and 2) run `pulumi plugin install` with that environment variable set to install any plugins that may be missing.

I apologize for the trouble, we’re working on improving this experience as we speak.

(My current theory is that we have accidentally regressed the automatic plugin installation that Pulumi normally does)

See also <https://pulumi-community.slack.com/archives/C84L4E3N1/p1552329796394800>

I have the same issue - running `yarn install` on jenkins, this creates node_modules, but ~/.pulumi directory is not created, and plugins are not installed
This worked before - not sure what changed

<@UB27BHS4B> The work around you suggested does not seem to work:
```
$ export PULUMI_ENABLE_LEGACY_PLUGIN_SEARCH=1
$ yarn install --frozen-lockfile
$ pulumi plugin install
[resource plugin aws-0.17.0] installing
[resource plugin kubernetes-0.21.0] installing
$ pulumi up --skip-preview --yes
Updating (TradeRev/test1):
Permalink: <https://app.pulumi.com/[snip]>
error: could not load plugin for aws provider 'urn:pulumi:test1::retail-api::pulumi:providers:aws::default': no resource plugin 'aws-v0.17.1' found in the workspace or on your $PATH, install the plugin using `pulumi plugin install resource aws v0.17.1`
```

<@UG901D7PX> thanks for the report, can you run `pulumi plugin install --verbose` and `pulumi plugin ls` and post their outputs?

Can you also post the version of yarn you’re using?