diff --git a/aos/util/BUILD b/aos/util/BUILD
index e712d54..af6faf5 100644
--- a/aos/util/BUILD
+++ b/aos/util/BUILD
@@ -1,10 +1,13 @@
 package(default_visibility = ["//visibility:public"])
 
+load("//tools:environments.bzl", "mcu_cpus")
+
 cc_library(
     name = "bitpacking",
     hdrs = [
         "bitpacking.h",
     ],
+    compatible_with = mcu_cpus,
     visibility = ["//visibility:public"],
     deps = [
         "//third_party/GSL",
diff --git a/y2019/jevois/BUILD b/y2019/jevois/BUILD
index 9304e8e..97a1d61 100644
--- a/y2019/jevois/BUILD
+++ b/y2019/jevois/BUILD
@@ -37,6 +37,7 @@
             "--output=$(location jevois_crc.c)",
         ]),
     ]),
+    compatible_with = mcu_cpus,
     tools = [
         "//third_party/pycrc:pycrc_main",
     ],
@@ -50,6 +51,7 @@
     hdrs = [
         "jevois_crc.h",
     ],
+    compatible_with = mcu_cpus,
     deps = [
         "//third_party/GSL",
     ],
@@ -69,6 +71,19 @@
 )
 
 cc_library(
+    name = "structures_mcu",
+    hdrs = [
+        "structures.h",
+    ],
+    restricted_to = mcu_cpus,
+    deps = [
+        "//aos/containers:sized_array",
+        "//aos/time:time_mcu",
+        "//third_party/eigen",
+    ],
+)
+
+cc_library(
     name = "spi",
     srcs = [
         "spi.cc",
@@ -88,6 +103,24 @@
 )
 
 cc_library(
+    name = "spi_mcu",
+    srcs = [
+        "spi.cc",
+    ],
+    hdrs = [
+        "spi.h",
+    ],
+    restricted_to = mcu_cpus,
+    deps = [
+        ":jevois_crc",
+        ":structures_mcu",
+        "//aos/util:bitpacking",
+        "//third_party/GSL",
+        "//third_party/optional",
+    ],
+)
+
+cc_library(
     name = "uart",
     srcs = [
         "uart.cc",
@@ -108,6 +141,26 @@
     ],
 )
 
+cc_library(
+    name = "uart_mcu",
+    srcs = [
+        "uart.cc",
+    ],
+    hdrs = [
+        "uart.h",
+    ],
+    restricted_to = mcu_cpus,
+    deps = [
+        ":cobs_mcu",
+        ":jevois_crc",
+        ":structures_mcu",
+        "//aos/containers:sized_array",
+        "//aos/util:bitpacking",
+        "//third_party/GSL",
+        "//third_party/optional",
+    ],
+)
+
 cc_test(
     name = "uart_test",
     srcs = [
@@ -141,6 +194,17 @@
     ],
 )
 
+cc_library(
+    name = "cobs_mcu",
+    hdrs = [
+        "cobs.h",
+    ],
+    restricted_to = mcu_cpus,
+    deps = [
+        "//third_party/GSL",
+    ],
+)
+
 cc_test(
     name = "cobs_test",
     srcs = [
diff --git a/y2019/jevois/cobs.h b/y2019/jevois/cobs.h
index 22590d9..112873d 100644
--- a/y2019/jevois/cobs.h
+++ b/y2019/jevois/cobs.h
@@ -6,8 +6,13 @@
 #include <algorithm>
 #include <array>
 
-#include "aos/logging/logging.h"
 #include "third_party/GSL/include/gsl/gsl"
+#ifdef __linux__
+#include "aos/logging/logging.h"
+#else
+#define CHECK(...)
+#define CHECK_LE(...)
+#endif
 
 // This file contains code for encoding and decoding Consistent Overhead Byte
 // Stuffing data. <http://www.stuartcheshire.org/papers/cobsforton.pdf> has
diff --git a/y2019/jevois/spi.cc b/y2019/jevois/spi.cc
index 28df8cf..abc1780 100644
--- a/y2019/jevois/spi.cc
+++ b/y2019/jevois/spi.cc
@@ -1,9 +1,14 @@
 #include "y2019/jevois/spi.h"
 
-#include "aos/logging/logging.h"
 #include "aos/util/bitpacking.h"
 #include "third_party/GSL/include/gsl/gsl"
 #include "y2019/jevois/jevois_crc.h"
+#ifdef __linux__
+#include "aos/logging/logging.h"
+#else
+#define CHECK(...)
+#define CHECK_GE(...)
+#endif
 
 // SPI transfer format (6x 8 bit frames):
 // 1. 1-byte brightness for each beacon channel.
diff --git a/y2019/jevois/structures.h b/y2019/jevois/structures.h
index fcc268e..28da405 100644
--- a/y2019/jevois/structures.h
+++ b/y2019/jevois/structures.h
@@ -11,6 +11,7 @@
 
 #include "aos/containers/sized_array.h"
 #include "aos/time/time.h"
+#include "third_party/GSL/include/gsl/gsl"
 
 namespace frc971 {
 namespace jevois {
diff --git a/y2019/jevois/uart.cc b/y2019/jevois/uart.cc
index 0db59a5..3621da8 100644
--- a/y2019/jevois/uart.cc
+++ b/y2019/jevois/uart.cc
@@ -2,10 +2,15 @@
 
 #include <array>
 
-#include "aos/logging/logging.h"
 #include "aos/util/bitpacking.h"
 #include "third_party/GSL/include/gsl/gsl"
 #include "y2019/jevois/jevois_crc.h"
+#ifdef __linux__
+#include "aos/logging/logging.h"
+#else
+#define CHECK(...)
+#define CHECK_GE(...)
+#endif
 
 namespace frc971 {
 namespace jevois {
@@ -50,8 +55,7 @@
   return result;
 }
 
-tl::optional<Frame> UartUnpackToTeensy(
-    gsl::span<const char> encoded_buffer) {
+tl::optional<Frame> UartUnpackToTeensy(gsl::span<const char> encoded_buffer) {
   std::array<char, uart_to_teensy_size()> buffer;
   if (static_cast<size_t>(
           CobsDecode<uart_to_teensy_size()>(encoded_buffer, &buffer).size()) !=
diff --git a/y2019/jevois/uart.h b/y2019/jevois/uart.h
index 87dcc97..2a4acec 100644
--- a/y2019/jevois/uart.h
+++ b/y2019/jevois/uart.h
@@ -2,6 +2,7 @@
 #define Y2019_JEVOIS_UART_H_
 
 #include "aos/containers/sized_array.h"
+#include "third_party/GSL/include/gsl/gsl"
 #include "third_party/optional/tl/optional.hpp"
 #include "y2019/jevois/cobs.h"
 #include "y2019/jevois/structures.h"