diff --git a/default.nix b/default.nix
index 125a066..5c2afab 100644
--- a/default.nix
+++ b/default.nix
@@ -36,6 +36,7 @@ in stdenv.mkDerivation {
     runHook preInstall
 
     install -Dm755 target/lib${pname}.so -t $out/lib
+    install -Dm755 include/* -t $out/include
 
     runHook postInstall
   '';
diff --git a/examples/amogus.c b/examples/amogus.c
index 342fb6e..a3f3fa1 100644
--- a/examples/amogus.c
+++ b/examples/amogus.c
@@ -8,14 +8,14 @@ int main(void) {
         return EXIT_FAILURE;
     }
 
-    PtkColor red = { .r = 1.0f, .g = 0.0f, .b = 0.0f};
+    PtkColor red = { .r = 1.0f, .g = 0.0f, .b = 0.0f };
 
     return ptk_run(PTK_BOX(
-        ptk_rect((PtkPos){ .x = 250.0f, .y = 200.0f}, (PtkSize){ .w = 300.0f, .h = 200.0f}, red),
-        ptk_rect((PtkPos){ .x = 250.0f, .y = 400.0f}, (PtkSize){ .w = 100.0f, .h = 100.0f}, red),
-        ptk_rect((PtkPos){ .x = 450.0f, .y = 400.0f}, (PtkSize){ .w = 100.0f, .h = 100.0f}, red),
-        ptk_circle((PtkPos){ .x = 400.0f, .y = 200.0f}, 150.0f, red),
-        ptk_rect((PtkPos){ .x = 200.0f, .y = 200.0f}, (PtkSize){ .w = 50.0f, .h = 125.0f}, red),
-        ptk_ellipse((PtkPos){ .x = 500.0f, .y = 200.0f}, (PtkSize){ .w = 100.0f, .h = 50.0f}, (PtkColor){ .r = 1.0f, .g = 1.0f, .b = 1.0f}),
+        ptk_rect((PtkPos){ .x = 250.0f, .y = 200.0f }, (PtkSize){ .w = 300.0f, .h = 200.0f }, red),
+        ptk_rect((PtkPos){ .x = 250.0f, .y = 400.0f }, (PtkSize){ .w = 100.0f, .h = 100.0f }, red),
+        ptk_rect((PtkPos){ .x = 450.0f, .y = 400.0f }, (PtkSize){ .w = 100.0f, .h = 100.0f }, red),
+        ptk_circle((PtkPos){ .x = 400.0f, .y = 200.0f }, 150.0f, red),
+        ptk_rect((PtkPos){ .x = 200.0f, .y = 200.0f }, (PtkSize){ .w = 50.0f, .h = 125.0f }, red),
+        ptk_ellipse((PtkPos){ .x = 500.0f, .y = 200.0f }, (PtkSize){ .w = 100.0f, .h = 50.0f }, (PtkColor){ .r = 1.0f, .g = 1.0f, .b = 1.0f }),
     ));
 }