Babel-core missing along with a load of other stuff

Npm run build isnt working like it should, despite following the instructions to the point. I get a bunch of errors indicating that files are missing. Please help!

iTerm error: ''' ➜ webpack-workshop git:(lesson-03-first-application) npm run build

webpack-treehouse-example@0.0.1 build /Users/j/Code/React/webpack-workshop webpack --optimize-minimize

Hash: 396f0bfb9d565b6f60f0 Version: webpack 1.13.2 Time: 349ms Asset Size Chunks Chunk Names index.html 3.03 kB [emitted] + 1 hidden modules

ERROR in Cannot find module 'babel-core'

ERROR in Error: Child compilation failed: Cannot find module 'babel-core'

• compiler.js:76 [webpack-workshop]/[html-webpack-plugin]/lib/compiler.js:76:16

• Compiler.js:214 Compiler.<anonymous> [webpack-workshop]/[webpack]/lib/Compiler.js:214:10

• Compiler.js:403 [webpack-workshop]/[webpack]/lib/Compiler.js:403:12

• Tapable.js:67 Compiler.next [webpack-workshop]/[tapable]/lib/Tapable.js:67:11

• CachePlugin.js:40 Compiler.<anonymous> [webpack-workshop]/[webpack]/lib/CachePlugin.js:40:4

• Tapable.js:71 Compiler.applyPluginsAsync [webpack-workshop]/[tapable]/lib/Tapable.js:71:13

• Compiler.js:400 Compiler.<anonymous> [webpack-workshop]/[webpack]/lib/Compiler.js:400:9

• Compilation.js:577 Compilation.<anonymous> [webpack-workshop]/[webpack]/lib/Compilation.js:577:13

• Tapable.js:60 Compilation.applyPluginsAsync [webpack-workshop]/[tapable]/lib/Tapable.js:60:69

• Compilation.js:572 Compilation.<anonymous> [webpack-workshop]/[webpack]/lib/Compilation.js:572:10

• Tapable.js:67 Compilation.next [webpack-workshop]/[tapable]/lib/Tapable.js:67:11

• UglifyJsPlugin.js:140 Compilation.<anonymous> [webpack-workshop]/[webpack]/lib/optimize/UglifyJsPlugin.js:140:4

• Tapable.js:71 Compilation.applyPluginsAsync [webpack-workshop]/[tapable]/lib/Tapable.js:71:13

• Compilation.js:567 Compilation.<anonymous> [webpack-workshop]/[webpack]/lib/Compilation.js:567:9

• Tapable.js:60 Compilation.applyPluginsAsync [webpack-workshop]/[tapable]/lib/Tapable.js:60:69

• Compilation.js:563 Compilation.<anonymous> [webpack-workshop]/[webpack]/lib/Compilation.js:563:8

• Tapable.js:60 Compilation.applyPluginsAsync [webpack-workshop]/[tapable]/lib/Tapable.js:60:69

• Compilation.js:525 Compilation.seal [webpack-workshop]/[webpack]/lib/Compilation.js:525:7

• Compiler.js:397 Compiler.<anonymous> [webpack-workshop]/[webpack]/lib/Compiler.js:397:15

• Tapable.js:103 [webpack-workshop]/[tapable]/lib/Tapable.js:103:11

• Compilation.js:445 Compilation.<anonymous> [webpack-workshop]/[webpack]/lib/Compilation.js:445:10

• Compilation.js:417 [webpack-workshop]/[webpack]/lib/Compilation.js:417:12

• Compilation.js:332 [webpack-workshop]/[webpack]/lib/Compilation.js:332:10

• async.js:52 [webpack-workshop]/[webpack]/[async]/lib/async.js:52:16

• async.js:246 done [webpack-workshop]/[webpack]/[async]/lib/async.js:246:17

• async.js:44 [webpack-workshop]/[webpack]/[async]/lib/async.js:44:16

• Compilation.js:202 errorAndCallback [webpack-workshop]/[webpack]/lib/Compilation.js:202:5

• Compilation.js:225 errorOrWarningAndCallback [webpack-workshop]/[webpack]/lib/Compilation.js:225:13

• Compilation.js:311 [webpack-workshop]/[webpack]/lib/Compilation.js:311:13

• Compilation.js:123 [webpack-workshop]/[webpack]/lib/Compilation.js:123:4

Child html-webpack-plugin for "index.html": + 2 hidden modules

ERROR in Cannot find module 'babel-core'
 @ ./~/html-webpack-plugin/lib/loader.js!./src/index.ejs 1:8-53

'''