diff --git i/build.rs w/build.rs
index 2174a43..cf93c2f 100644
--- i/build.rs
+++ w/build.rs
@@ -14,17 +14,8 @@ fn main() {
     // Print the path to make it available during the build
     println!("cargo:rustc-env=SUS_HOME={}", home_dir.to_str().unwrap());
 
-    // note: add error checking yourself.
-    let output = std::process::Command::new("git")
-        .args(["rev-parse", "HEAD"])
-        .output()
-        .unwrap();
-    let git_hash = String::from_utf8(output.stdout).unwrap();
-    println!("cargo:rustc-env=GIT_HASH={}", git_hash);
-    println!(
-        "cargo:rustc-env=BUILD_DATE={}",
-        chrono::Local::now().to_rfc3339_opts(chrono::SecondsFormat::Secs, false)
-    );
+    println!("cargo:rustc-env=GIT_HASH=@GIT_HASH@");
+    println!("cargo:rustc-env=BUILD_DATE=@GIT_DATE@");
 }
 
 fn get_sus_dir() -> PathBuf {