diff --git a/.gitignore b/.gitignore
index becd7f9..dab42ad 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 *
 !*/
 !*.*
+build
diff --git a/Readme.md b/Readme.md
index c51a20e..cc0ebc7 100644
--- a/Readme.md
+++ b/Readme.md
@@ -2,5 +2,4 @@ ngtcp2 for Nim
 ==============
 
 Wrapper around the [ngtcp2](https://github.com/ngtcp2/ngtcp2) C library for
-[Nim](https://nim-lang.org/). Requires [CMake](https://cmake.org/) to be
-installed.
+[Nim](https://nim-lang.org/).
diff --git a/build.sh b/build.sh
new file mode 100755
index 0000000..4e31628
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,24 @@
+#!/bin/bash
+root=$(dirname "$0")
+
+# install nimterop, if not already installed
+if ! [ -x "$(command -v toast)" ]; then
+  nimble install -y nimterop@0.6.11
+fi
+
+# run cmake on ngtcp2 sources
+cmake -S "${root}/sources" -B "${root}/build"
+
+# socket definitions
+cat "${root}/sockets.nim" > "${root}/ngtcp2.nim"
+
+# dividing line
+echo >> "${root}/ngtcp2.nim"
+
+# generate nim wrapper with nimterop
+toast \
+  --pnim \
+  --preprocess \
+  --includeDirs="${root}/sources/lib/includes" \
+  --includeDirs="${root}/build/lib/includes" \
+  "${root}/sources/lib/includes/ngtcp2/ngtcp2.h" >> "${root}/ngtcp2.nim"
diff --git a/ngtcp2.nimble b/ngtcp2.nimble
index c16a85f..4731ef3 100644
--- a/ngtcp2.nimble
+++ b/ngtcp2.nimble
@@ -5,9 +5,3 @@ description = "Nim wrapper around the ngtcp2 library"
 license = "MIT"
 
 requires "nim >= 1.2.6"
-requires "nimterop >= 0.6.11 & < 0.7.0"
-
-import os
-
-after install:
-  exec "nim c -r " & currentSourcePath.parentDir/"ngtcp2"/"make.nim"
diff --git a/ngtcp2/make.nim b/ngtcp2/make.nim
deleted file mode 100644
index cce1830..0000000
--- a/ngtcp2/make.nim
+++ /dev/null
@@ -1,14 +0,0 @@
-import nimterop/build
-import sources
-
-static:
-  gitPull(
-    "https://github.com/ngtcp2/ngtcp2",
-    checkout="d234d50",
-    outdir=ngtcp2src
-  )
-  cmake(
-    ngtcp2src,
-    check="lib"/"includes"/"ngtcp2"/"version.h",
-    flags="."
-  )
diff --git a/ngtcp2/sources.nim b/ngtcp2/sources.nim
deleted file mode 100644
index e0a4214..0000000
--- a/ngtcp2/sources.nim
+++ /dev/null
@@ -1,3 +0,0 @@
-import nimterop/build
-
-const ngtcp2src* = getProjectCacheDir("ngtcp2")
diff --git a/sockets.nim b/sockets.nim
new file mode 100644
index 0000000..0bbae5a
--- /dev/null
+++ b/sockets.nim
@@ -0,0 +1,13 @@
+# Import socket definitions from system
+
+when defined(windows):
+  {.passL: "-lws2_32".}
+  const socketheader = "<winsock2.h>"
+else:
+  const socketheader = "<sys/socket.h>"
+
+type
+  sockaddr*
+    {.header: socketheader, importc: "sockaddr".} = object
+  sockaddr_storage*
+    {.header: socketheader, importc: "sockaddr_storage".} = object