diff --git a/rssguard.pro b/rssguard.pro
index 4adb80c9f..6b5b7bb6f 100755
--- a/rssguard.pro
+++ b/rssguard.pro
@@ -23,23 +23,21 @@
 # Usage:
 #   a) DEBUG build for testing. (out of source build type)
 #     cd ../build-dir
-#     qmake ../rssguard-dir/rssguard.pro -r CONFIG+=debug PREFIX=C:\Program Files\RSS Guard
+#     qmake ../rssguard-dir/rssguard.pro -r CONFIG+=debug PREFIX=/usr
 #     make
 #     make install
 #
 #   b) RELEASE build for production use. (out of source build type)
 #     cd ../build-dir
-#     qmake ../rssguard-dir/rssguard.pro -r CONFIG+=release PREFIX=/usr INSTALL_ROOT=./app
+#     qmake ../rssguard-dir/rssguard.pro -r CONFIG+=release PREFIX=./usr
 #     make
-#     make INSTALL_ROOT=./app install
+#     make install
 #
 # Variables:
-#   PREFIX - specifies parent folder structure under which installed files will really finally lie.
-#   !!! This is usually needed on Linux and its typical value would be "/usr".
+#   PREFIX - specifies base folder to which files are copied during "make install" step.
 #
-#   INSTALL_ROOT - specifies the folder under which compiled application data will be temporarily placed
-#   after the "make install" step. Note that this variable has different meaning from PREFIX which describes
-#   the final path and is usually "/usr".
+#   INSTALL_ROOT - specifies additional output folder for "make install" step. When this variable is defined,
+#                  then it is prepended to PREFIX variable. This is useful for example on Linux, where
 #
 #   LRELEASE_EXECUTABLE - specifies the name/path of "lrelease" executable, defaults to "lrelease".
 #
@@ -92,14 +90,7 @@ isEmpty(LRELEASE_EXECUTABLE) {
   message(rssguard: LRELEASE_EXECUTABLE variable is not set.)
 }
 
-unix:!mac {
-  isEmpty(INSTALL_ROOT) {
-    message(rssguard: Variable INSTALL_ROOT is empty.)
-  }
-}
-
 # Custom definitions.
-DEFINES += APP_PREFIX='"\\\"$$PREFIX\\\""'
 DEFINES += APP_VERSION='"\\\"$$APP_VERSION\\\""'
 DEFINES += APP_NAME='"\\\"$$APP_NAME\\\""'
 DEFINES += APP_LOW_NAME='"\\\"$$APP_LOW_NAME\\\""'
@@ -517,16 +508,6 @@ win32 {
   QMAKE_EXTRA_TARGETS += windows_all
 }
 
-unix:!mac {
-  seven_zip.target = 7zip
-  seven_zip.commands = 7za a -t7z $$TARGET-$$APP_VERSION-win32.7z $$shell_path($$INSTALL_ROOT/*)
-
-  zip.target = zip
-  zip.commands = 7za a -tzip $$TARGET-$$APP_VERSION-win32.zip $$shell_path($$INSTALL_ROOT/*)
-
-  QMAKE_EXTRA_TARGETS += seven_zip zip
-}
-
 # Install all files on Windows.
 win32 {
   target.path = $$PREFIX
diff --git a/src/definitions/definitions.h b/src/definitions/definitions.h
index 629295a90..92658b5e8 100755
--- a/src/definitions/definitions.h
+++ b/src/definitions/definitions.h
@@ -208,17 +208,18 @@
 
 #if defined(Q_OS_LINUX)
 
-#define APP_DESKTOP_ENTRY_PATH APP_PREFIX + QString("/share/rssguard/autostart")
 #define APP_DESKTOP_SOURCE_ENTRY_FILE "rssguard.desktop.autostart"
 #define APP_DESKTOP_ENTRY_FILE "rssguard.desktop"
-#define APP_LANG_PATH APP_PREFIX + QString("/share/rssguard/l10n")
-#define APP_SKIN_PATH APP_PREFIX + QString("/share/rssguard/skins")
-#define APP_INFO_PATH APP_PREFIX + QString("/share/rssguard/information")
-#define APP_THEME_PATH APP_PREFIX + QString("/share/rssguard/icons")
-#define APP_MISC_PATH APP_PREFIX + QString("/share/rssguard/misc")
-#define APP_ICON_PATH APP_PREFIX + QString("/share/pixmaps/rssguard.png")
-#define APP_ICON_PLAIN_PATH APP_PREFIX + QString("/share/rssguard/icons/rssguard_plain.png")
-#define APP_INITIAL_FEEDS_PATH APP_PREFIX + QString("/share/rssguard/initial_feeds")
+
+#define APP_DESKTOP_ENTRY_PATH QApplication::applicationDirPath() + QString("/../share/rssguard/autostart")
+#define APP_LANG_PATH QApplication::applicationDirPath() + QString("/../share/rssguard/l10n")
+#define APP_SKIN_PATH QApplication::applicationDirPath() + QString("/../share/rssguard/skins")
+#define APP_INFO_PATH QApplication::applicationDirPath() + QString("/../share/rssguard/information")
+#define APP_THEME_PATH QApplication::applicationDirPath() + QString("/../share/rssguard/icons")
+#define APP_MISC_PATH QApplication::applicationDirPath() + QString("/../share/rssguard/misc")
+#define APP_ICON_PATH QApplication::applicationDirPath() + QString("/../share/pixmaps/rssguard.png")
+#define APP_ICON_PLAIN_PATH QApplication::applicationDirPath() + QString("/../share/rssguard/icons/rssguard_plain.png")
+#define APP_INITIAL_FEEDS_PATH QApplication::applicationDirPath() + QString("/../share/rssguard/initial_feeds")
 
 #elif defined(Q_OS_OSX)