diff --git a/Cargo.toml b/Cargo.toml
index aad17bf..511cd4a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,6 @@
 name = "raw-cpuid"
 version = "8.1.2"
 authors = ["Gerd Zellweger <mail@gerdzellweger.com>"]
-build = "build.rs"
 edition = "2018"
 
 description = "A library to parse the x86 CPUID instruction, written in rust with no external dependencies. The implementation closely resembles the Intel CPUID manual description. The library does only depend on libcore."
@@ -33,7 +32,3 @@ serde_derive = {version = "1.0", optional = true }
 libc = { version = "0.2", default-features = false }
 core_affinity = "0.5.10"
 rustversion = "1.0"
-
-[build-dependencies]
-rustc_version = "0.3"
-cc = "1"
diff --git a/build.rs b/build.rs
deleted file mode 100644
index 1c41b6e..0000000
--- a/build.rs
+++ /dev/null
@@ -1,16 +0,0 @@
-extern crate cc;
-extern crate rustc_version;
-use rustc_version::{version, version_meta, Channel, Version};
-
-fn main() {
-    let newer_than_1_27 = version().unwrap() >= Version::parse("1.27.0").unwrap();
-    if newer_than_1_27 {
-        println!("cargo:rustc-cfg=feature=\"use_arch\"");
-    } else {
-        cc::Build::new().file("src/cpuid.c").compile("libcpuid.a");
-    }
-
-    if version_meta().unwrap().channel == Channel::Nightly {
-        println!("cargo:rustc-cfg=feature=\"nightly\"");
-    }
-}
diff --git a/src/cpuid.c b/src/cpuid.c
deleted file mode 100644
index c014da4..0000000
--- a/src/cpuid.c
+++ /dev/null
@@ -1,32 +0,0 @@
-#include <stdint.h>
-
-void cpuid(uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx) {
-#ifdef _MSC_VER
-  uint32_t regs[4];
-  __cpuidex((int *)regs, *eax, *ecx);
-  *eax = regs[0], *ebx = regs[1], *ecx = regs[2], *edx = regs[3];
-#else
-  asm volatile(
-#if defined(__i386__) && defined(__PIC__)
-      // The reason for this ebx juggling is the -fPIC rust compilation mode.
-      // On 32-bit to locate variables it uses a global offset table whose
-      // pointer is stored in ebx. Without temporary storing ebx in edi, the
-      // compiler will complain about inconsistent operand constraints in an
-      // 'asm'.
-      // Also note that this is only an issue on older compiler versions.
-      "mov %%ebx, %%edi;"
-      "cpuid;"
-      "xchgl %%ebx, %%edi;"
-      :
-      "+a" (*eax),
-      "=D" (*ebx),
-#else
-      "cpuid"
-      :
-      "+a"(*eax),
-      "=b"(*ebx),
-#endif
-      "+c"(*ecx),
-      "=d"(*edx));
-#endif
-}
diff --git a/src/lib.rs b/src/lib.rs
index 6d4640e..a6e03ab 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -15,29 +15,7 @@ extern crate serde_derive;
 #[macro_use]
 extern crate bitflags;
 
-/// Provides `cpuid` on stable by linking against a C implementation.
-#[cfg(not(feature = "use_arch"))]
-pub mod native_cpuid {
-    use super::CpuIdResult;
-
-    extern "C" {
-        fn cpuid(a: *mut u32, b: *mut u32, c: *mut u32, d: *mut u32);
-    }
-
-    pub fn cpuid_count(mut eax: u32, mut ecx: u32) -> CpuIdResult {
-        let mut ebx = 0u32;
-        let mut edx = 0u32;
-
-        unsafe {
-            cpuid(&mut eax, &mut ebx, &mut ecx, &mut edx);
-        }
-
-        CpuIdResult { eax, ebx, ecx, edx }
-    }
-}
-
 /// Uses Rust's `cpuid` function from the `arch` module.
-#[cfg(feature = "use_arch")]
 pub mod native_cpuid {
     use super::CpuIdResult;