windows-installer: Error on OS X: "System.DllNotFoundException: msdelta.dll"

$ wine --version
wine-1.8.1

$ mono --version
Mono JIT compiler version 4.2.3 (Stable 4.2.3.4/832de4b Wed Mar 30 13:57:48 PDT 2016)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
    TLS:           normal
    SIGSEGV:       altstack
    Notification:  kqueue
    Architecture:  amd64
    Disabled:      none
    Misc:          softdebug 
    LLVM:          supported, not enabled.
    GC:            sgen

Any ideas?

$ DEBUG=electron-windows-installer:main npm run package -- win32 
  electron-windows-installer:main Using Mono: '/usr/local/bin/mono' +0ms
  electron-windows-installer:main Using Wine: '/usr/local/bin/wine' +2ms
  electron-windows-installer:main Created NuSpec file:
<?xml version="1.0" encoding="utf-8"?>
<package xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
  <metadata>
    <id>WebTorrent</id>
    <title>WebTorrent</title>
    <version>0.2.0</version>
    <authors>The WebTorrent Project</authors>
    <owners>The WebTorrent Project</owners>
    <iconUrl>https://raw.githubusercontent.com/feross/webtorrent-desktop/master/static/WebTorrent.ico</iconUrl>
    <requireLicenseAcceptance>false</requireLicenseAcceptance>
    <description>WebTorrent</description>
    <copyright>Copyright © 2016 The WebTorrent Project</copyright>
  </metadata>
  <files>
    <file src="locales/**" target="lib/net45/locales" />
    <file src="resources/**" target="lib/net45/resources" />
    <file src="*.bin" target="lib/net45" />
    <file src="*.dll" target="lib/net45" />
    <file src="*.pak" target="lib/net45" />
    <file src="Update.exe" target="lib/net45/squirrel.exe" />
    <file src="icudtl.dat" target="lib/net45/icudtl.dat" />
    <file src="LICENSE" target="lib/net45/LICENSE" />
    <file src="WebTorrent.exe" target="lib/net45/WebTorrent.exe" />
  </files>
</package>
 +53ms
  electron-windows-installer:main Attempting to build package from 'WebTorrent.nuspec'.
Successfully created package '/var/folders/n9/tqh670d16c3bd5853qgbvz1w0000gn/T/si-11635-82019-17kbzp6/WebTorrent.0.2.0.nupkg'.
 +24s
  electron-windows-installer:main  +17s
Failed with exit code: 255
Output:
System.DllNotFoundException: msdelta.dll
  at (wrapper managed-to-native) DeltaCompressionDotNet.MsDelta.NativeMethods:CreateDelta (DeltaCompressionDotNet.MsDelta.FileTypeSet,long,long,string,string,string,string,DeltaCompressionDotNet.MsDelta.DeltaInput,intptr,DeltaCompressionDotNet.MsDelta.HashAlgId,string)
  at DeltaCompressionDotNet.MsDelta.MsDeltaCompression.CreateDelta (System.String oldFilePath, System.String newFilePath, System.String deltaFilePath) <0x1063ef5e0 + 0x0007b> in <filename unknown>:0 
  at Squirrel.DeltaPackageBuilder.createDeltaForSingleFile (System.IO.FileInfo targetFile, System.IO.DirectoryInfo workingDirectory, System.Collections.Generic.Dictionary`2 baseFileListing) <0x1063eea40 + 0x003b0> in <filename unknown>:0 
  at Squirrel.DeltaPackageBuilder.CreateDeltaPackage (Squirrel.ReleasePackage basePackage, Squirrel.ReleasePackage newPackage, System.String outputFile) <0x1063c1dc0 + 0x006f9> in <filename unknown>:0 
  at Squirrel.Update.Program.Releasify (System.String package, System.String targetDir, System.String packagesDir, System.String bootstrapperExe, System.String backgroundGif, System.String signingOpts, System.String baseUrl, System.String setupIcon, Boolean generateMsi) <0x1052a8f60 + 0x00b5a> in <filename unknown>:0 
  at Squirrel.Update.Program.executeCommandLine (System.String[] args) <0x102a10930 + 0x0173e> in <filename unknown>:0 
  at Squirrel.Update.Program.main (System.String[] args) <0x102a0c260 + 0x0027a> in <filename unknown>:0