Fix build script.

build.rs

@@ -4,12 +4,11 @@ use std::fs;
 
 use std::option::Option::{self, Some, None};
 
-const ENV_DKP: &'static str = "DEVKITPRO";
+const ENV_DKP: &'static str = "CTRULIB";
 
 fn find_libctru() -> Option<PathBuf> {
     if let Ok(value) = env::var(ENV_DKP) {
         let mut path = PathBuf::from(value);
-        path.push("libctru");
         path.push("lib");
         // metadata returns Err if the dir does not exist
         if let Ok(metadata) = fs::metadata(path.as_path()) {
@@ -24,7 +23,14 @@ fn find_libctru() -> Option<PathBuf> {
 fn main() {
     if let Some(path) = find_libctru() {
         if let Some(s) = path.to_str() {
-            println!("cargo:rustc-link-search={}", s);
+            println!("cargo:rustc-link-lib=static=ctru");
+            println!("cargo:rustc-link-search=native={}", s);
+        } else {
+            println!("path is not a valid string");
+            std::process::exit(1);
         }
+    } else {
+        println!("could not find libctru");
+        std::process::exit(1);
     }
 }