diff --git a/src/compiler.ts b/src/compiler.ts
index 60a0f1b..c18ac7f 100644
--- a/src/compiler.ts
+++ b/src/compiler.ts
@@ -1,6 +1,5 @@
 import { delimiter, dirname, normalize, join } from 'path'
 import { Buffer } from 'buffer'
-import { createHash } from 'crypto'
 import { createReadStream } from 'fs'
 import { Readable } from 'stream'
 import { spawn } from 'child_process'
diff --git a/src/nexe.ts b/src/nexe.ts
index 1c207f2..b6958c9 100644
--- a/src/nexe.ts
+++ b/src/nexe.ts
@@ -1,6 +1,5 @@
 import { EOL } from 'os'
-import { compose, Middleware } from 'app-builder'
-import { NexeTarget } from './target'
+import { compose } from 'app-builder'
 import { NexeCompiler } from './compiler'
 import { normalizeOptions, NexeOptions, NexePatch } from './options'
 import resource from './steps/resource'
@@ -18,7 +17,6 @@ async function compile(
 ) {
   const options = normalizeOptions(compilerOptions)
   const compiler = new NexeCompiler(options)
-  const build = options.build
 
   const nexe = compose(
     clean,
diff --git a/src/options.ts b/src/options.ts
index 99d9072..1782999 100644
--- a/src/options.ts
+++ b/src/options.ts
@@ -1,7 +1,7 @@
 import * as parseArgv from 'minimist'
 import { NexeCompiler } from './compiler'
-import { isWindows, padRight } from './util'
-import { basename, extname, join, isAbsolute, relative, dirname, resolve } from 'path'
+import { isWindows } from './util'
+import { basename, extname, join, isAbsolute, resolve } from 'path'
 import { getTarget, NexeTarget } from './target'
 import { EOL, homedir } from 'os'
 import chalk from 'chalk'
diff --git a/src/patches/boot-nexe.ts b/src/patches/boot-nexe.ts
index c4e4033..f47acb5 100644
--- a/src/patches/boot-nexe.ts
+++ b/src/patches/boot-nexe.ts
@@ -48,6 +48,6 @@ const contentBuffer = Buffer.from(Array(contentSize))
 fs.readSync(fd, contentBuffer, 0, contentSize, contentStart)
 fs.closeSync(fd)
 const Module = require('module')
-process.mainModule = new Module(process.execPath, null)
-process.mainModule!.loaded = true
-;(process.mainModule as any)._compile(contentBuffer.toString(), process.execPath)
+const mod = new Module(process.execPath, null)
+mod.loaded = true
+mod._compile(contentBuffer.toString(), process.execPath)
diff --git a/src/patches/index.ts b/src/patches/index.ts
index b071446..9d4ad5c 100644
--- a/src/patches/index.ts
+++ b/src/patches/index.ts
@@ -5,7 +5,6 @@ import cli from './disable-node-cli'
 import flags from './flags'
 import ico from './ico'
 import rc from './node-rc'
-import { NexeCompiler, NexeOptions } from '../compiler'
 
 const patches = [gyp, bootNexe, buildFixes, cli, flags, ico, rc]
 
diff --git a/src/patches/third-party-main.ts b/src/patches/third-party-main.ts
index d13bf27..e3d3050 100644
--- a/src/patches/third-party-main.ts
+++ b/src/patches/third-party-main.ts
@@ -1,7 +1,4 @@
 import { NexeCompiler } from '../compiler'
-import { readFileSync } from 'fs'
-import { join } from 'path'
-import { wrap } from '../util'
 
 function semverGt(version: string, operand: string) {
   const [cMajor, cMinor, cPatch] = version.split('.').map(Number)
diff --git a/src/releases.ts b/src/releases.ts
index b00244e..7921e36 100644
--- a/src/releases.ts
+++ b/src/releases.ts
@@ -1,14 +1,5 @@
 import got = require('got')
-import download = require('download')
-import {
-  NodePlatform,
-  NodeArch,
-  platforms,
-  architectures,
-  NexeTarget,
-  getTarget,
-  targetsEqual
-} from './target'
+import { platforms, architectures, NexeTarget, getTarget, targetsEqual } from './target'
 export { NexeTarget }
 
 const versionsToSkip = [0, 1, 2, 3, 4, 5, 7, 9, 11]
diff --git a/src/steps/bundle.ts b/src/steps/bundle.ts
index 0386532..9f63cc5 100644
--- a/src/steps/bundle.ts
+++ b/src/steps/bundle.ts
@@ -1,7 +1,6 @@
 import { NexeCompiler } from '../compiler'
 import { readFileAsync, writeFileAsync } from '../util'
 import { resolve, relative } from 'path'
-import { NexeOptions } from '../options'
 import resolveFiles from 'resolve-dependencies'
 
 function makeRelative(cwd: string, path: string) {
diff --git a/src/steps/cli.ts b/src/steps/cli.ts
index dbd23fb..b777a74 100644
--- a/src/steps/cli.ts
+++ b/src/steps/cli.ts
@@ -1,7 +1,6 @@
 import { normalize, relative } from 'path'
-import { Readable } from 'stream'
 import { createWriteStream, chmodSync, statSync } from 'fs'
-import { readFileAsync, dequote, isWindows } from '../util'
+import { dequote } from '../util'
 import { NexeCompiler } from '../compiler'
 import { NexeTarget } from '../target'
 
diff --git a/src/steps/download.ts b/src/steps/download.ts
index 738664e..780e9e1 100644
--- a/src/steps/download.ts
+++ b/src/steps/download.ts
@@ -3,7 +3,6 @@ import { pathExistsAsync } from '../util'
 import { LogStep } from '../logger'
 import { IncomingMessage } from 'http'
 import { NexeCompiler } from '../compiler'
-import { NexeTarget } from '../target'
 
 function fetchNodeSourceAsync(dest: string, url: string, step: LogStep, options = {}) {
   const setText = (p: number) => step.modify(`Downloading Node: ${p.toFixed()}%...`)
diff --git a/src/steps/resource.ts b/src/steps/resource.ts
index 229eba8..c2899d1 100644
--- a/src/steps/resource.ts
+++ b/src/steps/resource.ts
@@ -1,5 +1,4 @@
 import { readFileAsync, isDirectoryAsync, each } from '../util'
-import { Buffer } from 'buffer'
 import * as globs from 'globby'
 import { NexeCompiler } from '../compiler'