Could not find a declaration file for module 'source-map'

When I try to build angular-cli, I got this error, anyone can help me?

Versions

node --version
V8.9.3
Windows10

Repro steps

• Step 1 npm run build
• Step 2
• Step 3

Observed behavior

  Compilation error.
packages/@ngtools/webpack/src/plugin.ts(5,28): error TS7016: Could not find a declaration file for module 'source-map'. 'E:/angular-cli/node_modules/source-map/source-map.js' implicitly has an 'any' type.
  Try `npm install @types/source-map` if it exists or add a new declaration (.d.ts) file containing `declare module 'source-map';`
packages/@ngtools/webpack/src/refactor.ts(5,53): error TS7016: Could not find a declaration file for module 'source-map'. 'E:/angular-cli/node_modules/source-map/source-map.js' implicitly has an 'any' type.
  Try `npm install @types/source-map` if it exists or add a new declaration (.d.ts) file containing `declare module 'source-map';`

Desired behavior

Mention any other details that might be useful (optional)

[zwwtj2014]

@symphony2014 Maybe package @types/source-map installed into node_modules has no type declaration file index.d.ts because of incorrect version. And you can try to set @types/source-map with version 0.5.2 instead of ^0.5.x.

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