diff --git a/LICENSE b/LICENSE
index 91e2258..302677a 100755
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2019 SuperStormer
+Copyright (c) 2020 SuperStormer
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/README.md b/README.md
index 74f8239..74c2427 100644
--- a/README.md
+++ b/README.md
@@ -2,17 +2,25 @@
 
 Compiles C code to Mindustry logic. Still in beta, so compiled output may not be fully optimized.
 
+# Installation
+
+`pip install git+https://github.com/SuperStormer/c2logic`
+
 # Usage
 
-`python3 -m c2logic filename -O optimization_level`
+Run the command line tool using:
+
+`c2logic filename -O optimization_level`
 
 where `filename` is a string and `optimization_level` is an integer.
 
+When developing your script, you can include `c2logic/builtins.h` located in the python include directory(location depends on system, mine is at `~/.local/include/python3.8/`)
+
 See [examples](./examples) for API sample usage.
 
 # Documentation
 
-See `include/mindustry.h` for API definitions.
+See `include/builtins.h` for API definitions.
 
 # Unsupported Features
 
diff --git a/compile_flags.txt b/compile_flags.txt
index 8667f37..f8412a6 100644
--- a/compile_flags.txt
+++ b/compile_flags.txt
@@ -1,4 +1,5 @@
--I ./include
+-I/home/larry/.local/include/python3.8/
 -Wall
 -Wextra
--Wno-main-return-type
\ No newline at end of file
+-Wno-main-return-type
+-Wno-incompatible-library-redeclaration
\ No newline at end of file
diff --git a/examples/control_flow.c b/examples/control_flow.c
index 3c90892..f445af0 100644
--- a/examples/control_flow.c
+++ b/examples/control_flow.c
@@ -1,4 +1,4 @@
-#include "../include/mindustry.h"
+#include "c2logic/builtins.h"
 /*expected output:
 5678
 0246
diff --git a/examples/func_calls.c b/examples/func_calls.c
new file mode 100644
index 0000000..f06e5cb
--- /dev/null
+++ b/examples/func_calls.c
@@ -0,0 +1,15 @@
+#include "c2logic/builtins.h"
+extern struct MindustryObject message1;
+double factorial(int x) {
+	int ret = 1;
+	for (int i = 2; i <= x; i++) {
+		ret *= x;
+	}
+	return ret;
+}
+void main(void) {
+	printd(factorial(4));
+	print("\n");
+	printd(factorial(5));
+	printflush(message1);
+}
\ No newline at end of file
diff --git a/examples/funcs.c b/examples/funcs.c
index 43c3193..9064964 100644
--- a/examples/funcs.c
+++ b/examples/funcs.c
@@ -1,4 +1,4 @@
-#include "../include/mindustry.h"
+#include "c2logic/builtins.h"
 extern struct MindustryObject message1;
 extern struct MindustryObject swarmer1;
 extern struct MindustryObject conveyor1;
diff --git a/examples/funcs2.c b/examples/funcs2.c
index c1f5f60..12103bd 100644
--- a/examples/funcs2.c
+++ b/examples/funcs2.c
@@ -1,4 +1,4 @@
-#include "../include/mindustry.h"
+#include "c2logic/builtins.h"
 extern struct MindustryObject message1;
 void main(void) {
 	double x = rand(20), y = rand(20);
diff --git a/include/mindustry.h b/include/builtins.h
similarity index 100%
rename from include/mindustry.h
rename to include/builtins.h
diff --git a/setup.py b/setup.py
index cd3d3c3..1bf2075 100755
--- a/setup.py
+++ b/setup.py
@@ -12,6 +12,7 @@ setuptools.setup(
 	author="SuperStormer",
 	url="https://github.com/SuperStormer/c2logic",
 	project_urls={"Source Code": "https://github.com/SuperStormer/c2logic"},
-	entry_points={"console_scripts": ["c2logic=c2logic:main"]},
+	headers=["include/builtins.h"],
+	entry_points={"console_scripts": ["c2logic=c2logic.compiler:main"]},
 	install_requires=["pycparser~=2.20"]
 )
\ No newline at end of file