diff --git a/src/lib.rs b/src/lib.rs
index 2614105..18d170d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -165,7 +165,16 @@ use crate::version::Version;
 use proc_macro::{Delimiter, Group, Ident, Punct, Spacing, Span, TokenStream, TokenTree};
 use std::iter::FromIterator;
 
-const RUSTVERSION: Version = include!(concat!(env!("OUT_DIR"), "/version.rs"));
+// ANDROID: Soong is providing the version of rustc via an env variable.
+const ANDROID_RUSTVERSION: &str = env!("ANDROID_RUST_VERSION");
+fn rust_version() -> Version {
+    let v: Vec<&str> = ANDROID_RUSTVERSION.split('.').collect();
+    Version {
+        minor: v[1].parse().unwrap(),
+        patch: v[2].parse().unwrap(),
+        channel: version::Channel::Stable,
+    }
+}
 
 #[proc_macro_attribute]
 pub fn stable(args: TokenStream, input: TokenStream) -> TokenStream {
@@ -226,7 +235,7 @@ fn try_cfg(introducer: &str, args: TokenStream, input: TokenStream) -> Result<To
     let expr = expr::parse(full_args)?;
     token::parse_end(full_args)?;
 
-    if expr.eval(RUSTVERSION) {
+    if expr.eval(rust_version()) {
         Ok(input)
     } else {
         Ok(TokenStream::new())
@@ -241,7 +250,7 @@ pub fn attr(args: TokenStream, input: TokenStream) -> TokenStream {
 }
 
 fn try_attr(args: attr::Args, input: TokenStream) -> Result<TokenStream> {
-    if !args.condition.eval(RUSTVERSION) {
+    if !args.condition.eval(rust_version()) {
         return Ok(input);
     }