diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1b16d1b87..676dc60ba 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -144,18 +144,19 @@ set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY_PROFILE "${CMAKE_BINARY_DIR}/lib")
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY_PROFILE "${CMAKE_BINARY_DIR}/lib")
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_PROFILE "${CMAKE_BINARY_DIR}/bin")
 
-set(CMARK_DIR           ${CMAKE_SOURCE_DIR}/third_party/cmark)
-set(CURL_DIR            ${CMAKE_SOURCE_DIR}/third_party/curl)
-set(GIFLIB_DIR          ${CMAKE_SOURCE_DIR}/third_party/giflib)
-set(LIBJPEG_DIR         ${CMAKE_SOURCE_DIR}/third_party/jpeg)
-set(LIBPNG_DIR          ${CMAKE_SOURCE_DIR}/third_party/libpng)
-set(LIBWEBP_DIR         ${CMAKE_SOURCE_DIR}/third_party/libwebp)
-set(PIXMAN_DIR          ${CMAKE_SOURCE_DIR}/third_party/pixman)
-set(FREETYPE_DIR        ${CMAKE_SOURCE_DIR}/third_party/freetype2)
-set(HARFBUZZ_DIR        ${CMAKE_SOURCE_DIR}/third_party/harfbuzz)
-set(SIMPLEINI_DIR       ${CMAKE_SOURCE_DIR}/third_party/simpleini)
-set(TINYXML_DIR         ${CMAKE_SOURCE_DIR}/third_party/tinyxml)
-set(ZLIB_DIR            ${CMAKE_SOURCE_DIR}/third_party/zlib)
+set(SOURCE_DATA_DIR     ${CMAKE_CURRENT_SOURCE_DIR}/data)
+set(CMARK_DIR           ${CMAKE_CURRENT_SOURCE_DIR}/third_party/cmark)
+set(CURL_DIR            ${CMAKE_CURRENT_SOURCE_DIR}/third_party/curl)
+set(GIFLIB_DIR          ${CMAKE_CURRENT_SOURCE_DIR}/third_party/giflib)
+set(LIBJPEG_DIR         ${CMAKE_CURRENT_SOURCE_DIR}/third_party/jpeg)
+set(LIBPNG_DIR          ${CMAKE_CURRENT_SOURCE_DIR}/third_party/libpng)
+set(LIBWEBP_DIR         ${CMAKE_CURRENT_SOURCE_DIR}/third_party/libwebp)
+set(PIXMAN_DIR          ${CMAKE_CURRENT_SOURCE_DIR}/third_party/pixman)
+set(FREETYPE_DIR        ${CMAKE_CURRENT_SOURCE_DIR}/third_party/freetype2)
+set(HARFBUZZ_DIR        ${CMAKE_CURRENT_SOURCE_DIR}/third_party/harfbuzz)
+set(SIMPLEINI_DIR       ${CMAKE_CURRENT_SOURCE_DIR}/third_party/simpleini)
+set(TINYXML_DIR         ${CMAKE_CURRENT_SOURCE_DIR}/third_party/tinyxml)
+set(ZLIB_DIR            ${CMAKE_CURRENT_SOURCE_DIR}/third_party/zlib)
 
 # Search in the "cmake" directory for additional CMake modules.
 list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 1963c86fc..1a19131d1 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -127,31 +127,31 @@ add_subdirectory(app)
 # Copy data/ directory target
 
 file(GLOB_RECURSE src_data_files
-  RELATIVE ${CMAKE_SOURCE_DIR}/data/ "${CMAKE_SOURCE_DIR}/data/*.*")
+  RELATIVE ${SOURCE_DATA_DIR}/ "${SOURCE_DATA_DIR}/*.*")
 foreach(fn ${src_data_files})
   add_custom_command(
     OUTPUT ${CMAKE_BINARY_DIR}/bin/data/${fn}
-    COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_SOURCE_DIR}/data/${fn} ${CMAKE_BINARY_DIR}/bin/data/${fn}
-    MAIN_DEPENDENCY ${CMAKE_SOURCE_DIR}/data/${fn})
+    COMMAND ${CMAKE_COMMAND} -E copy ${SOURCE_DATA_DIR}/${fn} ${CMAKE_BINARY_DIR}/bin/data/${fn}
+    MAIN_DEPENDENCY ${SOURCE_DATA_DIR}/${fn})
   list(APPEND out_data_files ${CMAKE_BINARY_DIR}/bin/data/${fn})
 endforeach()
 
 add_custom_command(
   OUTPUT ${CMAKE_BINARY_DIR}/bin/data/README.md
-  COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_SOURCE_DIR}/README.md ${CMAKE_BINARY_DIR}/bin/data/README.md
-  MAIN_DEPENDENCY ${CMAKE_SOURCE_DIR}/README.md)
+  COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/../README.md ${CMAKE_BINARY_DIR}/bin/data/README.md
+  MAIN_DEPENDENCY ${CMAKE_CURRENT_SOURCE_DIR}/../README.md)
 list(APPEND out_data_files ${CMAKE_BINARY_DIR}/bin/data/README.md)
 
 add_custom_command(
   OUTPUT ${CMAKE_BINARY_DIR}/bin/data/EULA.txt
-  COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_SOURCE_DIR}/EULA.txt ${CMAKE_BINARY_DIR}/bin/data/EULA.txt
-  MAIN_DEPENDENCY ${CMAKE_SOURCE_DIR}/EULA.txt)
+  COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/../EULA.txt ${CMAKE_BINARY_DIR}/bin/data/EULA.txt
+  MAIN_DEPENDENCY ${CMAKE_CURRENT_SOURCE_DIR}/../EULA.txt)
 list(APPEND out_data_files ${CMAKE_BINARY_DIR}/bin/data/EULA.txt)
 
 add_custom_command(
   OUTPUT ${CMAKE_BINARY_DIR}/bin/data/docs/LICENSES.md
-  COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_SOURCE_DIR}/docs/LICENSES.md ${CMAKE_BINARY_DIR}/bin/data/docs/LICENSES.md
-  MAIN_DEPENDENCY ${CMAKE_SOURCE_DIR}/docs/LICENSES.md)
+  COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/../docs/LICENSES.md ${CMAKE_BINARY_DIR}/bin/data/docs/LICENSES.md
+  MAIN_DEPENDENCY ${CMAKE_CURRENT_SOURCE_DIR}/../docs/LICENSES.md)
 list(APPEND out_data_files ${CMAKE_BINARY_DIR}/bin/data/docs/LICENSES.md)
 
 add_custom_target(copy_data DEPENDS ${out_data_files})
diff --git a/src/app/CMakeLists.txt b/src/app/CMakeLists.txt
index 97593a462..12e92a167 100644
--- a/src/app/CMakeLists.txt
+++ b/src/app/CMakeLists.txt
@@ -2,7 +2,7 @@
 # Copyright (C) 2001-2018  David Capello
 
 # Generate a ui::Widget for each widget in a XML file
-file(GLOB widget_files ${CMAKE_SOURCE_DIR}/data/widgets/*.xml)
+file(GLOB widget_files ${SOURCE_DATA_DIR}/widgets/*.xml)
 foreach(widget_file ${widget_files})
   get_filename_component(widget_name ${widget_file} NAME_WE)
   set(output_fn ${CMAKE_CURRENT_BINARY_DIR}/${widget_name}.xml.h)
@@ -19,7 +19,7 @@ foreach(widget_file ${widget_files})
 endforeach()
 
 # Generate preference types from data/pref.xml
-set(pref_xml ${CMAKE_SOURCE_DIR}/data/pref.xml)
+set(pref_xml ${SOURCE_DATA_DIR}/pref.xml)
 
 set(output_fn ${CMAKE_CURRENT_BINARY_DIR}/pref.xml.h)
 add_custom_command(
@@ -42,7 +42,7 @@ add_custom_command(
 list(APPEND generated_files ${output_fn})
 
 # Generate theme.xml.h from data/extensions/aseprite-theme/theme.xml
-set(theme_xml ${CMAKE_SOURCE_DIR}/data/extensions/aseprite-theme/theme.xml)
+set(theme_xml ${SOURCE_DATA_DIR}/extensions/aseprite-theme/theme.xml)
 set(output_fn ${CMAKE_CURRENT_BINARY_DIR}/theme.xml.h)
 add_custom_command(
   OUTPUT ${output_fn}
@@ -54,7 +54,7 @@ add_custom_command(
 list(APPEND generated_files ${output_fn})
 
 # Generate strings.ini.h from data/strings/en.ini
-set(strings_en_ini ${CMAKE_SOURCE_DIR}/data/strings/en.ini)
+set(strings_en_ini ${SOURCE_DATA_DIR}/strings/en.ini)
 set(output_fn ${CMAKE_CURRENT_BINARY_DIR}/strings.ini.h)
 add_custom_command(
   OUTPUT ${output_fn}
@@ -77,13 +77,13 @@ add_custom_command(
 list(APPEND generated_files ${output_fn})
 
 # Check translations
-file(GLOB string_files ${CMAKE_SOURCE_DIR}/data/strings/*.ini)
+file(GLOB string_files ${SOURCE_DATA_DIR}/strings/*.ini)
 set(output_fn ${CMAKE_CURRENT_BINARY_DIR}/check-translations.txt)
 add_custom_command(
   OUTPUT ${output_fn}
-  COMMAND ${GEN_EXE} --widgets-dir "${CMAKE_SOURCE_DIR}/data/widgets/" --strings-dir "${CMAKE_SOURCE_DIR}/data/strings/" --gui-file "${CMAKE_SOURCE_DIR}/data/gui.xml" >${output_fn}
+  COMMAND ${GEN_EXE} --widgets-dir "${SOURCE_DATA_DIR}/widgets/" --strings-dir "${SOURCE_DATA_DIR}/strings/" --gui-file "${SOURCE_DATA_DIR}/gui.xml" >${output_fn}
   WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
-  DEPENDS ${GEN_DEP} ${widget_files} ${string_files} "${CMAKE_SOURCE_DIR}/data/gui.xml")
+  DEPENDS ${GEN_DEP} ${widget_files} ${string_files} "${SOURCE_DATA_DIR}/gui.xml")
 list(APPEND generated_files ${output_fn})
 
 # Directory where generated files by "gen" utility will stay.