diff --git a/hermit/build.rs b/hermit/build.rs
index fea22e4d5..373e5d1ea 100644
--- a/hermit/build.rs
+++ b/hermit/build.rs
@@ -177,12 +177,13 @@ impl KernelSrc {
 			self.src_dir.join("rust-toolchain.toml").display()
 		);
 
-		// HERMIT_LOG_LEVEL_FILTER sets the log level filter at compile time
-		println!("cargo:rerun-if-env-changed=HERMIT_MANIFEST_DIR");
-		println!("cargo:rerun-if-env-changed=HERMIT_LOG_LEVEL_FILTER");
 		println!("cargo:rerun-if-env-changed=HERMIT_CAREFUL");
-		println!("cargo:rerun-if-env-changed=HERMIT_MTU");
+		println!("cargo:rerun-if-env-changed=HERMIT_ENCODED_RUSTFLAGS");
+		println!("cargo:rerun-if-env-changed=HERMIT_LOG_LEVEL_FILTER");
+		println!("cargo:rerun-if-env-changed=HERMIT_MANIFEST_DIR");
 		println!("cargo:rerun-if-env-changed=HERMIT_MRG_RXBUF_SIZE");
+		println!("cargo:rerun-if-env-changed=HERMIT_MTU");
+		println!("cargo:rerun-if-env-changed=HERMIT_RUSTFLAGS");
 		println!("cargo:rerun-if-env-changed=NO_COLOR");
 	}