diff --git a/Cargo.toml b/Cargo.toml
index 7589f6fe81..2cb2133a1c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,3 +16,13 @@ members = [
 [dependencies]
 fcntl = { path = "fcntl" }
 unistd = { path = "unistd" }
+
+[profile.dev]
+incremental = false
+lto = true
+panic = "abort"
+
+[profile.release]
+incremental = false
+lto = true
+panic = "abort"
diff --git a/fcntl/Cargo.toml b/fcntl/Cargo.toml
index 1403647b70..c8e3ff555c 100644
--- a/fcntl/Cargo.toml
+++ b/fcntl/Cargo.toml
@@ -8,4 +8,4 @@ build = "build.rs"
 cbindgen = "0.5"
 
 [dependencies]
-libc = "0.2"
+libc = { version = "0.2", default-features = false }
diff --git a/fcntl/build.rs b/fcntl/build.rs
index fc96c5a7b1..b04c12cdaf 100644
--- a/fcntl/build.rs
+++ b/fcntl/build.rs
@@ -1,11 +1,11 @@
 extern crate cbindgen;
 
-use std::env;
+use std::{env, fs};
 
 fn main() {
-    let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
-
+    let crate_dir = env::var("CARGO_MANIFEST_DIR").expect("CARGO_MANIFEST_DIR not set");
+    fs::create_dir_all("../target/include").expect("failed to create include directory");
     cbindgen::generate(crate_dir)
-      .expect("Unable to generate bindings")
-      .write_to_file("../target/fcntl.h");
+      .expect("failed to generate bindings")
+      .write_to_file("../target/include/fcntl.h");
 }
diff --git a/unistd/Cargo.toml b/unistd/Cargo.toml
index 08fece8fcc..9d3813b9de 100644
--- a/unistd/Cargo.toml
+++ b/unistd/Cargo.toml
@@ -8,4 +8,4 @@ build = "build.rs"
 cbindgen = "0.5"
 
 [dependencies]
-libc = "0.2"
+libc = { version = "0.2", default-features = false }
diff --git a/unistd/build.rs b/unistd/build.rs
index 6d467a9aa0..c12853664c 100644
--- a/unistd/build.rs
+++ b/unistd/build.rs
@@ -1,11 +1,11 @@
 extern crate cbindgen;
 
-use std::env;
+use std::{env, fs};
 
 fn main() {
-    let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
-
+    let crate_dir = env::var("CARGO_MANIFEST_DIR").expect("CARGO_MANIFEST_DIR not set");
+    fs::create_dir_all("../target/include").expect("failed to create include directory");
     cbindgen::generate(crate_dir)
-      .expect("Unable to generate bindings")
-      .write_to_file("../target/unistd.h");
+      .expect("failed to generate bindings")
+      .write_to_file("../target/include/unistd.h");
 }