diff --git a/Cargo.toml b/Cargo.toml
index eac1783..40a0dd6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -38,5 +38,5 @@ thiserror = "2.0"
 vergen-gitcl = { version = "1.0", features = ["build", "cargo", "rustc", "si"] }
 
 [features]
-bin = ["anyhow", "env_logger"]
+bin = ["anyhow", "env_logger", "flatmap"]
 flatmap = ["csv"]