Only build Emgu.CV.runtime.ubuntu nuget package on Ubuntu

platforms/nuget/Emgu.CV.runtime.ubuntu/CMakeLists.txt

@@ -2,25 +2,19 @@
 #  Copyright (C) 2004-2020 by EMGU Corporation. All rights reserved.
 # --------------------------------------------------------
 
-PROJECT(Emgu.CV.runtime.ubuntu.nuget)
-IF(WIN32)
-ADD_CUSTOM_TARGET(
-   ${PROJECT_NAME} ALL
-   COMMAND "${CMAKE_CURRENT_SOURCE_DIR}/../../../miscellaneous/nuget.exe" pack Package.nuspec -OutputDirectory "${CMAKE_CURRENT_SOURCE_DIR}/../"
-   WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
-)
-ELSE()
-ADD_CUSTOM_TARGET(
-   ${PROJECT_NAME} ALL
-   COMMAND ${DOTNET_EXECUTABLE} pack "${CMAKE_CURRENT_SOURCE_DIR}/../../../Emgu.CV.Platform/NetStandard/Emgu.CV.Platform.NetStandard.csproj" -c ${DEFAULT_CS_CONFIG} --no-build -p:NuspecFile="${CMAKE_CURRENT_SOURCE_DIR}/Package.nuspec" -o "${CMAKE_CURRENT_SOURCE_DIR}/../"
-   WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
-)
-ENDIF()
-
-ADD_DEPENDENCIES(${PROJECT_NAME} Emgu.CV.nuget)
-
-if(ENABLE_SOLUTION_FOLDERS)
-  set_target_properties(${PROJECT_NAME} PROPERTIES FOLDER "nuget")
-endif() 
+IF(IS_UBUNTU)
+  PROJECT(Emgu.CV.runtime.ubuntu.nuget)
 
+  ADD_CUSTOM_TARGET(
+    ${PROJECT_NAME} ALL
+    COMMAND ${DOTNET_EXECUTABLE} pack "${CMAKE_CURRENT_SOURCE_DIR}/../../../Emgu.CV.Platform/NetStandard/Emgu.CV.Platform.NetStandard.csproj" -c ${DEFAULT_CS_CONFIG} --no-build -p:NuspecFile="${CMAKE_CURRENT_SOURCE_DIR}/Package.nuspec" -o "${CMAKE_CURRENT_SOURCE_DIR}/../"
+    WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
+    )
+  
+  ADD_DEPENDENCIES(${PROJECT_NAME} Emgu.CV.nuget)
+  
+  if(ENABLE_SOLUTION_FOLDERS)
+    set_target_properties(${PROJECT_NAME} PROPERTIES FOLDER "nuget")
+  endif() 
+ENDIF()