diff --git a/README.md b/README.md
index 519221b..b12fc00 100644
--- a/README.md
+++ b/README.md
@@ -2,22 +2,34 @@
 NewTek NDI Python wrapper
 
 ## Setup
-### Windows and mac
+### Windows, mac, ubuntu
 Donwload and install NDI SDK.  
 https://ndi.tv/sdk/
 
 ### Arch Linux
 ```
-yay ndi-sdk
+yay -S ndi-sdk
 ```
 
-## Clone and build
+## Clone
 ```
 git clone https://github.com/buresu/ndi-python.git --recursive
+```
+
+## Build
+```
 cd /path/to/build
 cmake /path/to/project
 cmake --build /path/to/build --config Release
 ```
+
+For ubuntu you need to set the SDK directory in NDI_SDK_DIR.  
+And build as follows.  
+```
+cmake /path/to/project -DNDI_SDK_DIR=/path/to/ndisdk
+cmake --build /path/to/build --config Release
+```
+
 After build copy ndi-python binary and NDI binary to execute directory.  
 Enjoy!  
 
diff --git a/cmake/Modules/FindNDI.cmake b/cmake/Modules/FindNDI.cmake
index 85238b2..6b83368 100644
--- a/cmake/Modules/FindNDI.cmake
+++ b/cmake/Modules/FindNDI.cmake
@@ -20,7 +20,13 @@ elseif(APPLE)
     set(NDI_FOUND FALSE)
   endif()
 elseif(UNIX)
-  if(EXISTS "/usr/include/Processing.NDI.Lib.h")
+  if(EXISTS "${NDI_SDK_DIR}/include/Processing.NDI.Lib.h")
+    set(NDI_FOUND TRUE)
+    set(NDI_DIR ${NDI_SDK_DIR})
+    set(NDI_INCLUDE_DIR "${NDI_DIR}/include")
+    set(NDI_LIBRARY_DIR "${NDI_DIR}/lib/x86_64-linux-gnu")
+    set(NDI_LIBS "ndi")
+  elseif(EXISTS "/usr/include/Processing.NDI.Lib.h")
     set(NDI_FOUND TRUE)
     set(NDI_DIR "/usr")
     set(NDI_INCLUDE_DIR "${NDI_DIR}/include")
@@ -28,7 +34,7 @@ elseif(UNIX)
     set(NDI_LIBS "ndi")
   else()
     set(NDI_FOUND FALSE)
- endif()
+  endif()
 endif()
 
 include(FindPackageHandleStandardArgs)