Use programmatic API from Electron-Builder.

It seems that the package-json based configuration is deprecated.
See https://github.com/electron-userland/electron-builder/issues/3751

build.js

@@ -0,0 +1,72 @@
+const builder = require('electron-builder')
+const Platform = builder.Platform
+
+function getCurrentPlatform(){
+    switch(process.platform){
+        case 'win32':
+            return Platform.WINDOWS
+        case 'darwin':
+            return Platform.MAC
+        case 'linux':
+            return Platform.linux
+        default:
+            console.error('Cannot resolve current platform!')
+            return undefined
+    }
+}
+
+builder.build({
+    targets: (process.argv[2] != null && Platform[process.argv[2]] != null ? Platform[process.argv[2]] : getCurrentPlatform()).createTarget(),
+    config: {
+        appId: 'electronlauncher',
+        productName: 'Electron Launcher',
+        artifactName: '${productName}.${ext}',
+        copyright: 'Copyright © 2018-2019 Daniel Scalzi',
+        directories: {
+            buildResources: 'build',
+            output: 'dist'
+        },
+        win: {
+            target: [
+                {
+                    target: 'nsis',
+                    arch: 'x64'
+                }
+            ],
+            icon: 'build/icon.ico'
+        },
+        nsis: {
+            oneClick: false,
+            perMachine: true,
+            allowElevation: true,
+            installerIcon: 'build/icon.ico',
+            uninstallerIcon: 'build/icon.ico',
+            allowToChangeInstallationDirectory: true
+        },
+        mac: {
+            target: 'dmg',
+            category: 'public.app-category.games',
+            icon: 'build/icon.icns'
+        },
+        linux: {
+            target: 'AppImage',
+            maintainer: 'Daniel Scalzi',
+            vendor: 'Daniel Scalzi',
+            synopsis: 'Modded Minecraft Launcher',
+            description: 'Custom launcher which allows users to join modded servers. All mods, configurations, and updates are handled automatically.',
+            category: 'Game'
+        },
+        compression: 'maximum',
+        files: [
+            '!{dist,.gitignore,.vscode,docs,dev-app-update.yml,.travis.yml,.nvmrc,.eslintrc.json,build.js}'
+        ],
+        extraResources: [
+            'libraries'
+        ],
+        asar: true
+    }
+}).then(() => {
+    console.log('Build complete!')
+}).catch(err => {
+    console.error('Error during build!', err)
+})

package.json

@@ -13,12 +13,12 @@
   "main": "index.js",
   "scripts": {
     "start": "electron .",
-    "cilinux": "electron-builder --linux --win",
-    "cidarwin": "electron-builder --mac",
-    "dist": "cross-env ELECTRON_BUILDER_ALLOW_UNRESOLVED_DEPENDENCIES=true electron-builder",
-    "dist:win": "npm run dist -- --win --x64",
-    "dist:mac": "npm run dist -- --mac",
-    "dist:linux": "npm run dist -- --linux --x64",
+    "cilinux": "node build.js WINDOWS && node build.js LINUX",
+    "cidarwin": "node build.js MAC",
+    "dist": "cross-env ELECTRON_BUILDER_ALLOW_UNRESOLVED_DEPENDENCIES=true node build.js",
+    "dist:win": "npm run dist -- WINDOWS",
+    "dist:mac": "npm run dist -- MAC",
+    "dist:linux": "npm run dist -- LINUX",
     "lint": "eslint --config .eslintrc.json ."
   },
   "engines": {
@@ -48,58 +48,5 @@
   "repository": {
     "type": "git",
     "url": "git+https://github.com/dscalzi/ElectronLauncher.git"
-  },
-  "build": {
-    "appId": "electronlauncher",
-    "productName": "Electron Launcher",
-    "artifactName": "${productName}.${ext}",
-    "copyright": "Copyright © 2018-2019 Daniel Scalzi",
-    "directories": {
-      "buildResources": "build",
-      "output": "dist"
-    },
-    "win": {
-      "target": [
-        {
-          "target": "nsis",
-          "arch": "x64"
-        }
-      ],
-      "icon": "build/icon.ico"
-    },
-    "nsis": {
-      "oneClick": false,
-      "perMachine": true,
-      "allowElevation": true,
-      "installerIcon": "build/icon.ico",
-      "uninstallerIcon": "build/icon.ico",
-      "allowToChangeInstallationDirectory": true
-    },
-    "mac": {
-      "target": "dmg",
-      "category": "public.app-category.games",
-      "icon": "build/icon.icns"
-    },
-    "linux": {
-      "target": "AppImage",
-      "maintainer": "Daniel Scalzi",
-      "vendor": "Daniel Scalzi",
-      "synopsis": "Modded Minecraft Launcher",
-      "description": "Custom launcher which allows users to join modded servers. All mods, configurations, and updates are handled automatically.",
-      "category": "Game"
-    },
-    "deb": {
-      "compression": "xz",
-      "packageCategory": "Games",
-      "priority": "optional"
-    },
-    "compression": "maximum",
-    "files": [
-      "!{dist,.gitignore,.vscode,docs,dev-app-update.yml,.travis.yml,.nvmrc,.eslintrc.json}"
-    ],
-    "extraResources": [
-      "libraries"
-    ],
-    "asar": true
   }
 }