diff --git a/build.json b/build.json
index e0e05c8..e0bf280 100644
--- a/build.json
+++ b/build.json
@@ -35,11 +35,9 @@
         "src/core/iomgr/alarm_heap.c",
         "src/core/iomgr/endpoint.c",
         "src/core/iomgr/endpoint_pair_posix.c",
-        "src/core/iomgr/fd_posix.c",
-        "src/core/iomgr/iomgr.c",
-        "src/core/iomgr/iomgr_posix.c",
-        "src/core/iomgr/pollset_multipoller_with_poll_posix.c",
-        "src/core/iomgr/pollset_posix.c",
+        "src/core/iomgr/iomgr_libevent.c",
+        "src/core/iomgr/iomgr_libevent_use_threads.c",
+        "src/core/iomgr/pollset.c",
         "src/core/iomgr/resolve_address_posix.c",
         "src/core/iomgr/sockaddr_utils.c",
         "src/core/iomgr/socket_utils_common_posix.c",
@@ -85,8 +83,8 @@
         "src/core/transport/chttp2/stream_encoder.c",
         "src/core/transport/chttp2/stream_map.c",
         "src/core/transport/chttp2/timeout_encoding.c",
-        "src/core/transport/chttp2/varint.c",
         "src/core/transport/chttp2_transport.c",
+        "src/core/transport/chttp2/varint.c",
         "src/core/transport/metadata.c",
         "src/core/transport/stream_op.c",
         "src/core/transport/transport.c",
@@ -122,12 +120,10 @@
         "src/core/iomgr/alarm_internal.h",
         "src/core/iomgr/endpoint.h",
         "src/core/iomgr/endpoint_pair.h",
-        "src/core/iomgr/fd_posix.h",
+        "src/core/iomgr/iomgr_completion_queue_interface.h",
         "src/core/iomgr/iomgr.h",
-        "src/core/iomgr/iomgr_internal.h",
-        "src/core/iomgr/iomgr_posix.h",
+        "src/core/iomgr/iomgr_libevent.h",
         "src/core/iomgr/pollset.h",
-        "src/core/iomgr/pollset_posix.h",
         "src/core/iomgr/resolve_address.h",
         "src/core/iomgr/sockaddr.h",
         "src/core/iomgr/sockaddr_posix.h",
@@ -152,9 +148,9 @@
         "src/core/surface/server.h",
         "src/core/surface/surface_trace.h",
         "src/core/transport/chttp2/bin_encoder.h",
-        "src/core/transport/chttp2/frame.h",
         "src/core/transport/chttp2/frame_data.h",
         "src/core/transport/chttp2/frame_goaway.h",
+        "src/core/transport/chttp2/frame.h",
         "src/core/transport/chttp2/frame_ping.h",
         "src/core/transport/chttp2/frame_rst_stream.h",
         "src/core/transport/chttp2/frame_settings.h",
@@ -167,8 +163,8 @@
         "src/core/transport/chttp2/stream_encoder.h",
         "src/core/transport/chttp2/stream_map.h",
         "src/core/transport/chttp2/timeout_encoding.h",
-        "src/core/transport/chttp2/varint.h",
         "src/core/transport/chttp2_transport.h",
+        "src/core/transport/chttp2/varint.h",
         "src/core/transport/metadata.h",
         "src/core/transport/stream_op.h",
         "src/core/transport/transport.h",