diff --git a/build_extra/rust/BUILD.gn b/build_extra/rust/BUILD.gn
index b529f2f5ac..e3fc6db5f5 100644
--- a/build_extra/rust/BUILD.gn
+++ b/build_extra/rust/BUILD.gn
@@ -187,9 +187,9 @@ rust_component("ws2_32") {
 
 rust_component("futures") {
   source_root = "$registry_github/futures-0.1.23/src/lib.rs"
-  cfg = [
-    "feature=\"use_std\"",
-    "feature=\"with-deprecated\"",
+  features = [
+    "use_std",
+    "with-deprecated",
   ]
 }
 
@@ -298,6 +298,7 @@ rust_component("crossbeam_deque") {
 
 rust_component("crossbeam_epoch") {
   source_root = "$registry_github/crossbeam-epoch-0.5.1/src/lib.rs"
+  features = [ "use_std" ]
   extern = [
     ":arrayvec",
     ":cfg_if",
@@ -306,13 +307,12 @@ rust_component("crossbeam_epoch") {
     ":memoffset",
     ":scopeguard",
   ]
-  cfg = [ "feature=\"use_std\"" ]
 }
 
 rust_component("crossbeam_utils") {
   source_root = "$registry_github/crossbeam-utils-0.4.1/src/lib.rs"
+  features = [ "use_std" ]
   extern = [ ":cfg_if" ]
-  cfg = [ "feature=\"use_std\"" ]
 }
 
 rust_component("arrayvec") {
@@ -334,7 +334,7 @@ rust_component("memoffset") {
 
 rust_component("scopeguard") {
   source_root = "$registry_github/scopeguard-0.3.3/src/lib.rs"
-  cfg = [ "feature=\"use_std\"" ]
+  features = [ "use_std" ]
 }
 
 rust_component("num_cpus") {
diff --git a/build_extra/rust/rust.gni b/build_extra/rust/rust.gni
index 21b3972827..8f63bcc087 100644
--- a/build_extra/rust/rust.gni
+++ b/build_extra/rust/rust.gni
@@ -40,7 +40,6 @@ template("run_rustc") {
     assert(defined(invoker.source_root), "Must specify source_root")
     forward_variables_from(invoker,
                            [
-                             "cfg",
                              "crate_name",
                              "crate_type",
                              "crate_version",
@@ -123,15 +122,6 @@ template("run_rustc") {
       args += [ "--test" ]
     }
 
-    if (defined(cfg)) {
-      foreach(c, cfg) {
-        args += [
-          "--cfg",
-          c,
-        ]
-      }
-    }
-
     if (defined(features)) {
       foreach(f, features) {
         args += [
@@ -210,7 +200,6 @@ template("rust_component") {
     forward_variables_from(invoker,
                            [
                              "args",
-                             "cfg",
                              "crate_version",
                              "deps",
                              "extern",