Schematics CLI can't run schematic in v0.900.3

[mraible]

I have a Schematics library that I package locally with npm pack. Then I create a new Angular app, install my schematic and run it.

ng new angular-app --routing --style css
cd angular-app
npm install -D ../../oktadev*.tgz
schematics @oktadev/schematics:add-auth --issuer=$issuer --clientId=$clientId
ng test --watch=false && ng e2e

With v0.900.3 of Schematics CLI, the schematics command errors with:

+ @oktadev/schematics@1.2.1
added 22 packages from 15 contributors and audited 16701 packages in 8.069s

33 packages are looking for funding
  run `npm fund` for details

found 0 vulnerabilities

Error: Cannot find module '@oktadev/schematics/package.json'
Require stack:
- /usr/local/lib/node_modules/@angular-devkit/schematics-cli/node_modules/@angular-devkit/schematics/tools/node-module-engine-host.js
- /usr/local/lib/node_modules/@angular-devkit/schematics-cli/node_modules/@angular-devkit/schematics/tools/workflow/node-workflow.js
- /usr/local/lib/node_modules/@angular-devkit/schematics-cli/node_modules/@angular-devkit/schematics/tools/index.js
- /usr/local/lib/node_modules/@angular-devkit/schematics-cli/bin/schematics.js
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:794:15)
    at Function.resolve (internal/modules/cjs/helpers.js:80:19)

With @angular-devkit/schematics-cli@0.803.25, it works fine.

+ @oktadev/schematics@1.2.1
added 22 packages from 15 contributors and audited 16701 packages in 7.991s

33 packages are looking for funding
  run `npm fund` for details

found 0 vulnerabilities

    ✅️ Added '@okta/okta-angular v1.4.0' into dependencies
    🔍 Installing packages...
CREATE /src/app/auth-routing.module.ts (1261 bytes)
CREATE /src/app/home/home.component.html (180 bytes)
CREATE /src/app/home/home.component.spec.ts (964 bytes)
CREATE /src/app/home/home.component.ts (630 bytes)
CREATE /src/app/home/home.component.css (0 bytes)
CREATE /src/app/shared/okta/auth.interceptor.ts (1031 bytes)
UPDATE /src/app/app.module.ts (475 bytes)
UPDATE /package.json (1393 bytes)
UPDATE /src/app/app.component.spec.ts (1344 bytes)
UPDATE /src/app/app.component.ts (603 bytes)
added 13 packages from 13 contributors and audited 16717 packages in 6.525s

Is this a regression?

Yes, the previous version in which this bug was not present was: @angular-devkit/schematics-cli@0.803.25

Description

Schematics CLI can't run a schematic.

🔬 Minimal Reproduction

npm i -g @angular-devkit/schematics-cli
git clone https://github.com/oktadeveloper/schematics.git
cd schematics
npm i
./test-app.sh a

You'll see the error. To fix, run:

npm i -g @angular-devkit/schematics-cli@0.803.25
rm -rf apps
./test-app.sh a

This time, there will be no stack trace.

🌍 Your Environment

     _                      _                 ____ _     ___
    / \   _ __   __ _ _   _| | __ _ _ __     / ___| |   |_ _|
   / △ \ | '_ \ / _` | | | | |/ _` | '__|   | |   | |    | |
  / ___ \| | | | (_| | |_| | | (_| | |      | |___| |___ | |
 /_/   \_\_| |_|\__, |\__,_|_|\__,_|_|       \____|_____|___|
                |___/


Angular CLI: 9.0.3
Node: 12.13.0
OS: darwin x64

Angular: undefined
...
Ivy Workspace: Yes

Package                      Version
------------------------------------------------------
@angular-devkit/architect    0.900.3 (cli-only)
@angular-devkit/core         9.0.3
@angular-devkit/schematics   9.0.3
@angular/cdk                 8.2.3
@schematics/angular          9.0.3
@schematics/update           0.803.21
rxjs                         6.5.4
typescript                   3.8.2