diff --git a/build.rs b/build.rs
index fdc9b74..9407ff7 100644
--- a/build.rs
+++ b/build.rs
@@ -12,17 +12,5 @@ fn main() {
 }
 
 fn get_git_version() -> Result<String, Box<dyn Error>> {
-  let tag = Command::new("git").args(&["describe", "--abbrev=0"]).output()?;
-  let tag = match tag.status.code() {
-    Some(0) => String::from_utf8(tag.stdout)?,
-    _ => "0.0.0".to_string(),
-  };
-  let count = String::from_utf8(Command::new("git").args(&["rev-list", "--count", "HEAD"]).output()?.stdout)?;
-  let commit = String::from_utf8(Command::new("git").args(&["rev-parse", "--short", "HEAD"]).output()?.stdout)?;
-  let version = format!("{}.r{}.{}", tag.trim(), count.trim(), commit.trim());
-
-  match version.as_str() {
-    "0.0.0.r." => Err("could not retrieve version".into()),
-    version => Ok(version.to_string()),
-  }
+  Ok(String::from_utf8(Command::new("./contrib/git-version.sh").output()?.stdout)?)
 }
diff --git a/contrib/git-version.sh b/contrib/git-version.sh
new file mode 100755
index 0000000..15131d2
--- /dev/null
+++ b/contrib/git-version.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+git describe --long | sed 's/-/.r/;s/-/./'