Gatsby: Updating Gatsby results in error on build and run.

[Knaackee]

After updating the gatsby package from 2.0.91 to 2.0.119 i got

```
Error: Cannot find module 'graphql'

• v8-compile-cache.js:159 require
  [source]/[v8-compile-cache]/v8-compile-cache.js:159:20

• index.js:5 Object.
  [source]/[graphql-type-json]/lib/index.js:5:16

• v8-compile-cache.js:178 Module._compile
  [source]/[v8-compile-cache]/v8-compile-cache.js:178:30

• v8-compile-cache.js:159 require
  [source]/[v8-compile-cache]/v8-compile-cache.js:159:20

• graphql.js:4 Object.
  [source]/[gatsby]/graphql.js:4:21

• v8-compile-cache.js:178 Module._compile
  [source]/[v8-compile-cache]/v8-compile-cache.js:178:30

So i did install the `graphql` package.

After that i got

success open and validate gatsby-configs — 0.235 s
success load plugins — 0.131 s
success onPreInit — 0.075 s
success delete html and css files from previous builds — 0.006 s
success initialize cache — 0.007 s
success copy gatsby files — 0.052 s
success onPreBootstrap — 0.008 s
success source and transform nodes — 0.018 s
error Invalid schema passed

Error: Invalid schema passed

• mergeSchemas.js:127
  [source]/[graphql-tools]/dist/stitching/mergeSchemas.js:127:19

• Array.forEach

• mergeSchemas.js:65 mergeSchemasImplementation
  [source]/[graphql-tools]/dist/stitching/mergeSchemas.js:65:13

• mergeSchemas.js:26 mergeSchemas
  [source]/[graphql-tools]/dist/stitching/mergeSchemas.js:26:12

• index.js:57 Object.
  [source]/[gatsby]/dist/schema/index.js:57:20

• Generator.next

• util.js:16 tryCatcher
  [source]/[bluebird]/js/release/util.js:16:23

• promise.js:512 Promise._settlePromiseFromHandler
  [source]/[bluebird]/js/release/promise.js:512:31

• promise.js:569 Promise._settlePromise
  [source]/[bluebird]/js/release/promise.js:569:18

• promise.js:614 Promise._settlePromise0
  [source]/[bluebird]/js/release/promise.js:614:10

• promise.js:694 Promise._settlePromises
  [source]/[bluebird]/js/release/promise.js:694:18

• async.js:138 _drainQueueStep
  [source]/[bluebird]/js/release/async.js:138:12

• async.js:131 _drainQueue
  [source]/[bluebird]/js/release/async.js:131:9

• async.js:147 Async._drainQueues
  [source]/[bluebird]/js/release/async.js:147:5

```

I tried, updating all plugins as well as don't use any plugin at all. Nothing helped.

Any ideas?

[pieh]

Can you try deleting node_modules and reinstalling them? You also shouldn't need to install graphql package yourself (please try removing it from package.json before reinstalling dependencies).

[Knaackee]

Sorry for not mentioned it, but i (off course) tried that.

My site is just a simple personal portfolio site.
I can make the repo public for review if you want @pieh

[pieh]

I can make the repo public for review if you want @pieh

That would be great @Knaackee!

[Mrtenz]

I got the same issue when I install the graphql package. Removing it solved the issue for me, but I get these warnings now:

warning "gatsby > [email protected]" has incorrect peer dependency "graphql@^0.12.0 || ^0.13.0".
warning "gatsby > [email protected]" has incorrect peer dependency "graphql@^0.10.0 || ^0.11.0 || ^0.12.0 || ^0.13.0".
warning "gatsby > [email protected]" has incorrect peer dependency "graphql@^0.13.0".

[humphreybc]

I also ran into this issue after upgrading gatsby from 2.0.85 to 2.1.18. In my case, I had "graphql": "0.13.2", in my package.json file. I removed that, blew away .cache and node_modules, reinstalled, and tried to start Gatsby again. Then it worked fine.

[steelbridge-io]

I also had trouble with this. I used NVM and was able move up to 10.15.2 and that resolved the issue.

[DSchau]

@Knaackee can you link to your repository? We can take a look and help debug that further once that's provided!

Thanks!

[Knaackee]

Today ive updated the dependencies to the current latest. Now the build works again.

[DSchau]

@Knaackee OK! Thanks for letting us know--if this comes up again, please do reply and we can investigate further.

As always, a reproduction is very much appreciated!

Thanks everyone!