diff --git a/c++/app4triqs/CMakeLists.txt b/c++/app4triqs/CMakeLists.txt
index 7bf1b64c..26584a97 100644
--- a/c++/app4triqs/CMakeLists.txt
+++ b/c++/app4triqs/CMakeLists.txt
@@ -6,7 +6,7 @@ target_link_libraries(app4triqs_c PUBLIC triqs PRIVATE project_warnings)
 
 # Configure compilation
 target_compile_options(app4triqs_c PUBLIC -fPIC)
-target_include_directories(app4triqs_c PUBLIC $<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}/c++>)
+target_include_directories(app4triqs_c PUBLIC $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/c++>)
 target_compile_definitions(app4triqs_c PUBLIC
 				APP4TRIQS_GIT_HASH=${APP4TRIQS_GIT_HASH}
 				TRIQS_GIT_HASH=${TRIQS_GIT_HASH}
diff --git a/doc/CMakeLists.txt b/doc/CMakeLists.txt
index 2c1e3366..75f0ca56 100644
--- a/doc/CMakeLists.txt
+++ b/doc/CMakeLists.txt
@@ -49,7 +49,7 @@ macro(generate_docs header_file)
   )
 endmacro(generate_docs)
 
-generate_docs(${CMAKE_SOURCE_DIR}/c++/app4triqs/toto.hpp)
+generate_docs(${PROJECT_SOURCE_DIR}/c++/app4triqs/toto.hpp)
 
 # ---------------------------------
 # Install
diff --git a/doc/conf.py.in b/doc/conf.py.in
index 32b6f1a3..fbeb2309 100644
--- a/doc/conf.py.in
+++ b/doc/conf.py.in
@@ -24,7 +24,7 @@ copyright = u'2017-2018 N. Wentzell, O. Parcollet 2018-2019 The Simons Foundatio
 version = '@APP4TRIQS_VERSION@'
 
 mathjax_path = "@TRIQS_MATHJAX_PATH@/MathJax.js?config=default"
-templates_path = ['@CMAKE_SOURCE_DIR@/doc/_templates']
+templates_path = ['@PROJECT_SOURCE_DIR@/doc/_templates']
 
 html_theme = 'triqs'
 html_theme_path = ['@TRIQS_THEMES_PATH@']
@@ -35,7 +35,7 @@ html_context = {'header_title': 'app4triqs',
                                  ['Documentation', 'documentation'],
                                  ['Issues', 'issues'],
                                  ['About app4triqs', 'about']]}
-html_static_path = ['@CMAKE_SOURCE_DIR@/doc/_static']
+html_static_path = ['@PROJECT_SOURCE_DIR@/doc/_static']
 html_sidebars = {'index': ['sideb.html', 'searchbox.html']}
 
 htmlhelp_basename = 'APP4TRIQSdoc'