diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,24 +1,39 @@
 CMAKE_MINIMUM_REQUIRED(VERSION 2.6)
 
-IF(EXISTS ${CMAKE_SOURCE_DIR}/cmake/version.cmake)
-  INCLUDE(${CMAKE_SOURCE_DIR}/cmake/version.cmake)
-ELSE(EXISTS ${CMAKE_SOURCE_DIR}/cmake/version.cmake)
-  SET(PROJECT_NAME "LEMON")
-  SET(PROJECT_VERSION "hg-tip" CACHE STRING "LEMON version string.")
-ENDIF(EXISTS ${CMAKE_SOURCE_DIR}/cmake/version.cmake)
+SET(PROJECT_NAME "LEMON")
+PROJECT(${PROJECT_NAME})
 
-PROJECT(${PROJECT_NAME})
+IF(EXISTS ${PROJECT_SOURCE_DIR}/cmake/version.cmake)
+  INCLUDE(${PROJECT_SOURCE_DIR}/cmake/version.cmake)
+ELSEIF(DEFINED ENV{LEMON_VERSION})
+  SET(LEMON_VERSION $ENV{LEMON_VERSION} CACHE STRING "LEMON version string.")
+ELSE()
+  EXECUTE_PROCESS(
+    COMMAND hg id -i
+    WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
+    OUTPUT_VARIABLE HG_REVISION
+    ERROR_QUIET
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+  )
+  IF(HG_REVISION STREQUAL "")
+    SET(HG_REVISION "hg-tip")
+  ENDIF()
+  SET(LEMON_VERSION ${HG_REVISION} CACHE STRING "LEMON version string.")
+ENDIF()
+
+SET(PROJECT_VERSION ${LEMON_VERSION})
 
 SET(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)
 
-INCLUDE(FindDoxygen)
-INCLUDE(FindGhostscript)
+FIND_PACKAGE(Doxygen)
+FIND_PACKAGE(Ghostscript)
 FIND_PACKAGE(GLPK 4.33)
 FIND_PACKAGE(CPLEX)
 FIND_PACKAGE(COIN)
 
 INCLUDE(CheckTypeSize)
-CHECK_TYPE_SIZE("long long" LEMON_LONG_LONG)
+CHECK_TYPE_SIZE("long long" LONG_LONG)
+SET(LEMON_HAVE_LONG_LONG ${HAVE_LONG_LONG})
 
 ENABLE_TESTING()
 
@@ -28,73 +43,88 @@
   ADD_SUBDIRECTORY(tools)
   ADD_SUBDIRECTORY(doc)
   ADD_SUBDIRECTORY(test)
-ENDIF(${CMAKE_SOURCE_DIR} STREQUAL ${PROJECT_SOURCE_DIR})
+ENDIF()
 
-IF(${CMAKE_SOURCE_DIR} STREQUAL ${PROJECT_SOURCE_DIR})
-  IF(WIN32)
-    SET(CPACK_PACKAGE_NAME ${PROJECT_NAME})
-    SET(CPACK_PACKAGE_VENDOR "EGRES")
-    SET(CPACK_PACKAGE_DESCRIPTION_SUMMARY
-      "LEMON - Library for Efficient Modeling and Optimization in Networks")
-    SET(CPACK_RESOURCE_FILE_LICENSE "${PROJECT_SOURCE_DIR}/LICENSE")
+CONFIGURE_FILE(
+  ${PROJECT_SOURCE_DIR}/cmake/LEMONConfig.cmake.in
+  ${PROJECT_BINARY_DIR}/cmake/LEMONConfig.cmake
+  @ONLY
+)
+IF(UNIX)
+  INSTALL(
+    FILES ${PROJECT_BINARY_DIR}/cmake/LEMONConfig.cmake
+    DESTINATION share/lemon/cmake
+  )
+ELSEIF(WIN32)
+  INSTALL(
+    FILES ${PROJECT_BINARY_DIR}/cmake/LEMONConfig.cmake
+    DESTINATION cmake
+  )
+ENDIF()
 
-    SET(CPACK_PACKAGE_VERSION ${PROJECT_VERSION})
+IF(${CMAKE_SOURCE_DIR} STREQUAL ${PROJECT_SOURCE_DIR} AND WIN32)
+  SET(CPACK_PACKAGE_NAME ${PROJECT_NAME})
+  SET(CPACK_PACKAGE_VENDOR "EGRES")
+  SET(CPACK_PACKAGE_DESCRIPTION_SUMMARY
+    "LEMON - Library for Efficient Modeling and Optimization in Networks")
+  SET(CPACK_RESOURCE_FILE_LICENSE "${PROJECT_SOURCE_DIR}/LICENSE")
 
-    SET(CPACK_PACKAGE_INSTALL_DIRECTORY
-      "${PROJECT_NAME} ${PROJECT_VERSION}")
-    SET(CPACK_PACKAGE_INSTALL_REGISTRY_KEY
-      "${PROJECT_NAME} ${PROJECT_VERSION}")
+  SET(CPACK_PACKAGE_VERSION ${PROJECT_VERSION})
 
-    SET(CPACK_COMPONENTS_ALL headers library html_documentation bin)
+  SET(CPACK_PACKAGE_INSTALL_DIRECTORY
+    "${PROJECT_NAME} ${PROJECT_VERSION}")
+  SET(CPACK_PACKAGE_INSTALL_REGISTRY_KEY
+    "${PROJECT_NAME} ${PROJECT_VERSION}")
 
-    SET(CPACK_COMPONENT_HEADERS_DISPLAY_NAME "C++ headers")
-    SET(CPACK_COMPONENT_LIBRARY_DISPLAY_NAME "Dynamic-link library")
-    SET(CPACK_COMPONENT_BIN_DISPLAY_NAME "Command line utilities")
-    SET(CPACK_COMPONENT_HTML_DOCUMENTATION_DISPLAY_NAME "HTML documentation")
+  SET(CPACK_COMPONENTS_ALL headers library html_documentation bin)
 
-    SET(CPACK_COMPONENT_HEADERS_DESCRIPTION
-      "C++ header files")
-    SET(CPACK_COMPONENT_LIBRARY_DESCRIPTION
-      "DLL and import library")
-    SET(CPACK_COMPONENT_BIN_DESCRIPTION
-      "Command line utilities")
-    SET(CPACK_COMPONENT_HTML_DOCUMENTATION_DESCRIPTION
-      "Doxygen generated documentation")
+  SET(CPACK_COMPONENT_HEADERS_DISPLAY_NAME "C++ headers")
+  SET(CPACK_COMPONENT_LIBRARY_DISPLAY_NAME "Dynamic-link library")
+  SET(CPACK_COMPONENT_BIN_DISPLAY_NAME "Command line utilities")
+  SET(CPACK_COMPONENT_HTML_DOCUMENTATION_DISPLAY_NAME "HTML documentation")
 
-    SET(CPACK_COMPONENT_HEADERS_DEPENDS library)
+  SET(CPACK_COMPONENT_HEADERS_DESCRIPTION
+    "C++ header files")
+  SET(CPACK_COMPONENT_LIBRARY_DESCRIPTION
+    "DLL and import library")
+  SET(CPACK_COMPONENT_BIN_DESCRIPTION
+    "Command line utilities")
+  SET(CPACK_COMPONENT_HTML_DOCUMENTATION_DESCRIPTION
+    "Doxygen generated documentation")
 
-    SET(CPACK_COMPONENT_HEADERS_GROUP "Development")
-    SET(CPACK_COMPONENT_LIBRARY_GROUP "Development")
-    SET(CPACK_COMPONENT_HTML_DOCUMENTATION_GROUP "Documentation")
+  SET(CPACK_COMPONENT_HEADERS_DEPENDS library)
 
-    SET(CPACK_COMPONENT_GROUP_DEVELOPMENT_DESCRIPTION
-      "Components needed to develop software using LEMON")
-    SET(CPACK_COMPONENT_GROUP_DOCUMENTATION_DESCRIPTION
-      "Documentation of LEMON")
+  SET(CPACK_COMPONENT_HEADERS_GROUP "Development")
+  SET(CPACK_COMPONENT_LIBRARY_GROUP "Development")
+  SET(CPACK_COMPONENT_HTML_DOCUMENTATION_GROUP "Documentation")
 
-    SET(CPACK_ALL_INSTALL_TYPES Full Developer)
+  SET(CPACK_COMPONENT_GROUP_DEVELOPMENT_DESCRIPTION
+    "Components needed to develop software using LEMON")
+  SET(CPACK_COMPONENT_GROUP_DOCUMENTATION_DESCRIPTION
+    "Documentation of LEMON")
 
-    SET(CPACK_COMPONENT_HEADERS_INSTALL_TYPES Developer Full)
-    SET(CPACK_COMPONENT_LIBRARY_INSTALL_TYPES Developer Full)
-    SET(CPACK_COMPONENT_HTML_DOCUMENTATION_INSTALL_TYPES Full)
+  SET(CPACK_ALL_INSTALL_TYPES Full Developer)
 
-    SET(CPACK_GENERATOR "NSIS")
-    SET(CPACK_NSIS_MUI_ICON "${PROJECT_SOURCE_DIR}/cmake/nsis/lemon.ico")
-    SET(CPACK_NSIS_MUI_UNIICON "${PROJECT_SOURCE_DIR}/cmake/nsis/uninstall.ico")
-    #SET(CPACK_PACKAGE_ICON "${PROJECT_SOURCE_DIR}/cmake/nsis\\\\installer.bmp")
-    SET(CPACK_NSIS_INSTALLED_ICON_NAME "bin\\\\lemon.ico")
-    SET(CPACK_NSIS_DISPLAY_NAME "${CPACK_PACKAGE_INSTALL_DIRECTORY} ${PROJECT_NAME}")
-    SET(CPACK_NSIS_HELP_LINK "http:\\\\\\\\lemon.cs.elte.hu")
-    SET(CPACK_NSIS_URL_INFO_ABOUT "http:\\\\\\\\lemon.cs.elte.hu")
-    SET(CPACK_NSIS_CONTACT "lemon-user@lemon.cs.elte.hu")
-    SET(CPACK_NSIS_CREATE_ICONS_EXTRA "
-      CreateShortCut \\\"$SMPROGRAMS\\\\$STARTMENU_FOLDER\\\\Documentation.lnk\\\" \\\"$INSTDIR\\\\share\\\\doc\\\\index.html\\\"
-      ")
-    SET(CPACK_NSIS_DELETE_ICONS_EXTRA "
-      !insertmacro MUI_STARTMENU_GETFOLDER Application $MUI_TEMP
-      Delete \\\"$SMPROGRAMS\\\\$MUI_TEMP\\\\Documentation.lnk\\\"
-      ")
+  SET(CPACK_COMPONENT_HEADERS_INSTALL_TYPES Developer Full)
+  SET(CPACK_COMPONENT_LIBRARY_INSTALL_TYPES Developer Full)
+  SET(CPACK_COMPONENT_HTML_DOCUMENTATION_INSTALL_TYPES Full)
 
-    INCLUDE(CPack)
-  ENDIF(WIN32)
-ENDIF(${CMAKE_SOURCE_DIR} STREQUAL ${PROJECT_SOURCE_DIR})
+  SET(CPACK_GENERATOR "NSIS")
+  SET(CPACK_NSIS_MUI_ICON "${PROJECT_SOURCE_DIR}/cmake/nsis/lemon.ico")
+  SET(CPACK_NSIS_MUI_UNIICON "${PROJECT_SOURCE_DIR}/cmake/nsis/uninstall.ico")
+  #SET(CPACK_PACKAGE_ICON "${PROJECT_SOURCE_DIR}/cmake/nsis\\\\installer.bmp")
+  SET(CPACK_NSIS_INSTALLED_ICON_NAME "bin\\\\lemon.ico")
+  SET(CPACK_NSIS_DISPLAY_NAME "${CPACK_PACKAGE_INSTALL_DIRECTORY} ${PROJECT_NAME}")
+  SET(CPACK_NSIS_HELP_LINK "http:\\\\\\\\lemon.cs.elte.hu")
+  SET(CPACK_NSIS_URL_INFO_ABOUT "http:\\\\\\\\lemon.cs.elte.hu")
+  SET(CPACK_NSIS_CONTACT "lemon-user@lemon.cs.elte.hu")
+  SET(CPACK_NSIS_CREATE_ICONS_EXTRA "
+    CreateShortCut \\\"$SMPROGRAMS\\\\$STARTMENU_FOLDER\\\\Documentation.lnk\\\" \\\"$INSTDIR\\\\share\\\\doc\\\\index.html\\\"
+    ")
+  SET(CPACK_NSIS_DELETE_ICONS_EXTRA "
+    !insertmacro MUI_STARTMENU_GETFOLDER Application $MUI_TEMP
+    Delete \\\"$SMPROGRAMS\\\\$MUI_TEMP\\\\Documentation.lnk\\\"
+    ")
+
+  INCLUDE(CPack)
+ENDIF()