diff --git a/.gitignore b/.gitignore
index 3b3e4f6..ae043f6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@ __pycache__/
 compile_commands.json
 
 sysroot/bin
+sysroot/usr/bin
diff --git a/CMakeLists.txt b/CMakeLists.txt
index fb00460..ae70f18 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,4 +15,5 @@ set(BASE_LINK_FLAGS "-nostdlib")
 add_subdirectory(zion)
 add_subdirectory(lib)
 add_subdirectory(yunq)
+add_subdirectory(usr)
 add_subdirectory(sys)
diff --git a/usr/CMakeLists.txt b/usr/CMakeLists.txt
new file mode 100644
index 0000000..083abbf
--- /dev/null
+++ b/usr/CMakeLists.txt
@@ -0,0 +1,2 @@
+
+add_subdirectory(testbed)
diff --git a/usr/testbed/CMakeLists.txt b/usr/testbed/CMakeLists.txt
new file mode 100644
index 0000000..792290a
--- /dev/null
+++ b/usr/testbed/CMakeLists.txt
@@ -0,0 +1,21 @@
+
+add_executable(testbed
+  test.cpp
+  )
+
+target_include_directories(testbed
+   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
+
+target_link_libraries(testbed
+  mammoth
+)
+
+set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "")
+
+set_target_properties(testbed PROPERTIES
+  COMPILE_FLAGS "${CMAKE_CXX_FLAGS} ${BASE_COMPILE_FLAGS}"
+  LINK_FLAGS "${CMAKE_EXE_LINK_FLAGS} ${BASE_LINK_FLAGS}"
+)
+
+install(TARGETS testbed DESTINATION usr/bin)
+
diff --git a/usr/testbed/test.cpp b/usr/testbed/test.cpp
new file mode 100644
index 0000000..ef3f2eb
--- /dev/null
+++ b/usr/testbed/test.cpp
@@ -0,0 +1,7 @@
+#include <mammoth/util/debug.h>
+
+uint64_t main(uint64_t init_port_cap) {
+  dbgln("testbed");
+
+  return glcr::OK;
+}