diff --git a/libc/cmake/modules/LLVMLibCArchitectures.cmake b/libc/cmake/modules/LLVMLibCArchitectures.cmake
--- a/libc/cmake/modules/LLVMLibCArchitectures.cmake
+++ b/libc/cmake/modules/LLVMLibCArchitectures.cmake
@@ -163,6 +163,12 @@
   set(LIBC_TARGET_OS_IS_BAREMETAL TRUE)
 elseif(LIBC_TARGET_OS STREQUAL "linux")
   set(LIBC_TARGET_OS_IS_LINUX TRUE)
+elseif(LIBC_TARGET_OS STREQUAL "poky")
+  # poky are ustom Linux-base systems created by yocto. Since these are Linux
+  # images, we change the LIBC_TARGET_OS to linux. This define is used to
+  # include the right directories during compilation.
+  set(LIBC_TARGET_OS_IS_LINUX TRUE)
+  set(LIBC_TARGET_OS "linux")
 elseif(LIBC_TARGET_OS STREQUAL "darwin")
   set(LIBC_TARGET_OS_IS_DARWIN TRUE)
 elseif(LIBC_TARGET_OS STREQUAL "windows")