module.exports = class Definition {
  constructor (props) {
    Object.assign(this, props)

    // TODO: only guard if missing both source and binaries
    // once we're able to build a binary-only package:
    // https://github.com/nodenv/node-build/issues/259
    if (!this.packageName) throw Error('skipping')
  }

  get preamble () {
    return ''
  }

  get install () {
    return `install_package "${this.packageName}" "${this.downloadUri}"`
  }

  get postamble () {
    return ''
  }

  get downloadUri () {
    return `${this.url}#${this.shasum}`
  }

  get binarySet () {
    return this.binaries.join('\n') + (this.binaries.length ? '\n' : '')
  }

  toString () {
    return (
      []
        .concat(this.preamble, this.binarySet, this.install, this.postamble)
        .filter(i => i)
        .join('\n') + '\n'
    )
  }
}

module.exports = class Definition {
  constructor (props) {
    Object.assign(this, props)

    // TODO: only guard if missing both source and binaries
    // once we're able to build a binary-only package:
    // https://github.com/nodenv/node-build/issues/259
    if (!this.packageName) throw Error('skipping')
  }

  get preamble () {
    return ''
  }

  get install () {
    return `install_package "${this.packageName}" "${this.downloadUri}"`
  }

  get postamble () {
    return ''
  }

  get downloadUri () {
    return `${this.url}#${this.shasum}`
  }

  toString () {
    return (
      []
        .concat(
          this.preamble,
          this.binaries,
          this.binaries.length ? ' ' : '',
          this.install,
          this.postamble
        )
        .filter(i => i)
        .join('\n') + '\n'
    )
  }
}

--- 
+++ 
@@ -24,16 +24,14 @@
     return `${this.url}#${this.shasum}`
   }
 
+  get binarySet () {
+    return this.binaries.join('\n') + (this.binaries.length ? '\n' : '')
+  }
+
   toString () {
     return (
       []
-        .concat(
-          this.preamble,
-          this.binaries,
-          this.binaries.length ? ' ' : '',
-          this.install,
-          this.postamble
-        )
+        .concat(this.preamble, this.binarySet, this.install, this.postamble)
         .filter(i => i)
         .join('\n') + '\n'
     )
Fix newline separation for binary lines
