diff --git a/justfile b/justfile
index 1c966f4..e6f748b 100644
--- a/justfile
+++ b/justfile
@@ -1,5 +1,5 @@
 release := ""
-cargo_flags := if release != "" { "--release" } else { "" }
+cargo_flags := "-Zjson-target-spec" + if release != "" { "--release" } else { "" }
 bin_path := if release != "" { "target/riscv64/release" } else { "target/riscv64/debug" }
 
 default: run