build: enable 'derive' feature of 'serde' crate

Cargo.lock

@@ -1021,6 +1021,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 name = "serde"
 version = "1.0.99"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "serde_derive 1.0.99 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "serde_derive"

build_extra/rust/BUILD.gn

@@ -1153,8 +1153,17 @@ rust_rlib("serde") {
   source_root = "$cargo_home/registry/src/github.com-1ecc6299db9ec823/serde-1.0.99/src/lib.rs"
   features = [
     "default",
+    "derive",
+    "serde_derive",
     "std",
   ]
+  extern = [
+    {
+      label = ":serde_derive"
+      crate_type = "proc_macro"
+      crate_name = "serde_derive"
+    },
+  ]
 
   # Added by custom-build script.
   cfg = [

cli/Cargo.toml

@@ -37,7 +37,7 @@ regex = "1.2.1"
 remove_dir_all = "0.5.2"
 ring = "~0.14.6"
 rustyline = "5.0.2"
-serde = "1.0.99"
+serde = { version = "1.0.99", features = ["derive"] }
 serde_derive = "1.0.99"
 serde_json = { version = "1.0.40", features = [ "preserve_order" ] }
 source-map-mappings = "0.5.0"