diff --git a/.gitignore b/.gitignore
deleted file mode 100644
index 03d24c5..0000000
--- a/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-libraylib.a
diff --git a/build.zig b/build.zig
index 82edbfb..d6bc6ab 100644
--- a/build.zig
+++ b/build.zig
@@ -1,5 +1,5 @@
 const std = @import("std");
-const raylib = @import("./3rdparty/raylib/src/build.zig");
+const raylib = @import("build_raylib.zig");
 
 pub fn build(b: *std.build.Builder) void {
     // Standard target options allows the person running `zig build` to choose
diff --git a/build_raylib.zig b/build_raylib.zig
new file mode 100644
index 0000000..bced3d0
--- /dev/null
+++ b/build_raylib.zig
@@ -0,0 +1,83 @@
+const std = @import("std");
+
+pub fn Pkg(srcdir: []const u8) type {
+    return struct {
+        pub fn addRaylib(b: *std.build.Builder, target: std.zig.CrossTarget) *std.build.LibExeObjStep {
+            // Standard release options allow the person running `zig build` to select
+            // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall.
+            const mode = b.standardReleaseOptions();
+
+            const raylib_flags = &[_][]const u8{
+                "-std=gnu99",
+                "-DPLATFORM_DESKTOP",
+                "-DGL_SILENCE_DEPRECATION=199309L",
+                "-fno-sanitize=undefined", // https://github.com/raysan5/raylib/issues/1891
+            };
+
+            const raylib = b.addStaticLibrary("raylib", srcdir ++ "/raylib.h");
+            raylib.setTarget(target);
+            raylib.setBuildMode(mode);
+            raylib.linkLibC();
+
+            raylib.addIncludeDir(srcdir ++ "/external/glfw/include");
+
+            raylib.addCSourceFiles(&.{
+                srcdir ++ "/raudio.c",
+                srcdir ++ "/rcore.c",
+                srcdir ++ "/rmodels.c",
+                srcdir ++ "/rshapes.c",
+                srcdir ++ "/rtext.c",
+                srcdir ++ "/rtextures.c",
+                srcdir ++ "/utils.c",
+            }, raylib_flags);
+
+            switch (raylib.target.toTarget().os.tag) {
+                .windows => {
+                    raylib.addCSourceFiles(&.{srcdir ++ "/rglfw.c"}, raylib_flags);
+                    raylib.linkSystemLibrary("winmm");
+                    raylib.linkSystemLibrary("gdi32");
+                    raylib.linkSystemLibrary("opengl32");
+                    raylib.addIncludeDir("external/glfw/deps/mingw");
+                },
+                .linux => {
+                    raylib.addCSourceFiles(&.{srcdir ++ "/rglfw.c"}, raylib_flags);
+                    raylib.linkSystemLibrary("GL");
+                    raylib.linkSystemLibrary("rt");
+                    raylib.linkSystemLibrary("dl");
+                    raylib.linkSystemLibrary("m");
+                    raylib.linkSystemLibrary("X11");
+                },
+                .macos => {
+                    // On macos rglfw.c include Objective-C files.
+                    const raylib_flags_extra_macos = &[_][]const u8{
+                        "-ObjC",
+                    };
+                    raylib.addCSourceFiles(
+                        &.{srcdir ++ "/rglfw.c"},
+                        raylib_flags ++ raylib_flags_extra_macos,
+                    );
+                    raylib.linkFramework("Foundation");
+                },
+                else => {
+                    @panic("Unsupported OS");
+                },
+            }
+
+            raylib.setOutputDir("./");
+            raylib.install();
+            return raylib;
+        }
+    };
+}
+
+const lib = Pkg("./3rdparty/raylib/src");
+
+pub fn build(b: *std.build.Builder) void {
+    // Standard target options allows the person running `zig build` to choose
+    // what target to build for. Here we do not override the defaults, which
+    // means any target is allowed, and the default is native. Other options
+    // for restricting supported target set are available.
+    const target = b.standardTargetOptions(.{});
+
+    _ = lib.addRaylib(b, target);
+}
diff --git a/justfile b/justfile
deleted file mode 100644
index acbc9ed..0000000
--- a/justfile
+++ /dev/null
@@ -1,2 +0,0 @@
-run:
-	nixGL zig build run
diff --git a/shell.nix b/shell.nix
index 9f0dece..ec522b7 100644
--- a/shell.nix
+++ b/shell.nix
@@ -2,7 +2,6 @@
 
 pkgs.mkShell {
   buildInputs = with pkgs; [
-    just
     zig
 
     xorg.libX11