diff --git a/pysap/info.py b/pysap/info.py
index c6a51650..5eac6818 100644
--- a/pysap/info.py
+++ b/pysap/info.py
@@ -75,12 +75,12 @@
     "pyqtgraph>=0.10.0",
     "progressbar2>=3.34.3",
     "modopt>=1.4.0",
-    "scikit-learn>=0.19.1",
     "PyWavelets>=1.0.0"
 ]
 PREINSTALL_REQUIRES = [
     "pybind11>=2.3.0",
     "pyqt5>=5.12.2"
+    "scikit-learn>=0.19.1",
 ]
 EXTRA_REQUIRES = {
     "gui": {
diff --git a/sparse2d/python/CMakeLists.txt b/sparse2d/python/CMakeLists.txt
index 117e64fd..e1b02cfd 100644
--- a/sparse2d/python/CMakeLists.txt
+++ b/sparse2d/python/CMakeLists.txt
@@ -48,6 +48,8 @@ project(pysparse)
 
   # Custom modules
   include(BuildCfitsIO)
+  get_filename_component(SPARSE2D_INSTALL_DIR ${PYTHON_EXECUTABLE} DIRECTORY)
+  message(STATUS "Binary output path : ${SPARSE2D_INSTALL_DIR}")
   include(BuildSparse2D)
 
   # Includes
diff --git a/sparse2d/python/cmake/Modules/BuildSparse2D.cmake b/sparse2d/python/cmake/Modules/BuildSparse2D.cmake
index 93c03dc9..c69750d8 100644
--- a/sparse2d/python/cmake/Modules/BuildSparse2D.cmake
+++ b/sparse2d/python/cmake/Modules/BuildSparse2D.cmake
@@ -11,17 +11,16 @@ ExternalProject_Add(sparse2d
     # GIT_TAG master
     DEPENDS cfitsio
     CONFIGURE_COMMAND cmake ../sparse2d
-        -DCMAKE_INSTALL_PREFIX=${CMAKE_BINARY_DIR}/extern
+        -DCMAKE_INSTALL_PREFIX=${SPARSE2D_INSTALL_DIR}/..
         -DCFITSIO_INCLUDE_DIRS=${cfitsio_INCLUDE_DIR}
         -DCFITSIO_LIBRARY_DIRS=${cfitsio_LIBRARY_DIR}
         -DCFITSIO_LIBRARIES=${cfitsio_LIBRARIES}
         -DCMAKE_BUILD_TYPE=RELEASE
     BUILD_COMMAND make install
         -j8
-    INSTALL_COMMAND ""
     BUILD_IN_SOURCE 0
     )
 
-set(sparse2d_LIBRARY_DIR ${CMAKE_BINARY_DIR}/extern/lib/ )
-set(sparse2d_INCLUDE_DIR ${CMAKE_BINARY_DIR}/extern/include/ )
+set(sparse2d_LIBRARY_DIR ${SPARSE2D_INSTALL_DIR}/../lib/ )
+set(sparse2d_INCLUDE_DIR ${SPARSE2D_INSTALL_DIR}/../include/ )
 set(sparse2d_LIBRARIES -lmga2d -lsparse3d -lsparse2d -lsparse1d -ltools)