diff --git a/Cargo.toml b/Cargo.toml
index 08dad3e..5a902a0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,7 +8,6 @@
 repository = "https://github.com/alexcrichton/proc-macro2"
 homepage = "https://github.com/alexcrichton/proc-macro2"
 documentation = "https://docs.rs/proc-macro2"
-build = "build.rs"
 edition = "2018"
 description = """
 A stable implementation of the upcoming new `proc_macro` API. Comes with an