diff --git a/app/app.pro b/app/app.pro
index 4d47065..a39a320 100644
--- a/app/app.pro
+++ b/app/app.pro
@@ -18,6 +18,8 @@
 TARGET = mindforger
 TEMPLATE = app
 
+include(../config.pri)
+
 QT += widgets
 
 mfner {
@@ -297,7 +299,7 @@ RESOURCES += \
 # See http://doc.qt.io/qt-5/qmake-advanced-usage.html
 
 binfile.files += mindforger
-binfile.path = /usr/bin/
+binfile.path = $$PREFIX/bin/
 INSTALLS += binfile
 
 # ########################################
diff --git a/config.pri b/config.pri
new file mode 100644
index 0000000..ce05df1
--- /dev/null
+++ b/config.pri
@@ -0,0 +1,3 @@
+isEmpty(PREFIX) {
+ PREFIX = /usr
+}
diff --git a/deps/discount/discount.pro b/deps/discount/discount.pro
index a8dfe35..ec16468 100644
--- a/deps/discount/discount.pro
+++ b/deps/discount/discount.pro
@@ -5,6 +5,8 @@
 # Webpage: http://www.pell.portland.or.us/~orc/Code/discount/
 #
 
+include(../../config.pri)
+
 QT       -= core gui
 
 TARGET = discount
@@ -46,7 +48,7 @@ unix:!symbian {
     maemo5 {
         target.path = /opt/usr/lib
     } else {
-        target.path = /usr/lib
+        target.path = $$PREFIX/lib
     }
     INSTALLS += target
 }
diff --git a/mindforger.pro b/mindforger.pro
index ae627f2..0953856 100644
--- a/mindforger.pro
+++ b/mindforger.pro
@@ -32,6 +32,8 @@ TEMPLATE = subdirs
 
 SUBDIRS = deps lib app
 
+include(config.pri)
+
 # build dependencies
 lib.depends = deps
 app.depends = lib
@@ -44,20 +46,20 @@ app.depends = lib
 #IMPORTANT: binfile MUST be specified in app/app.pro (project next to/that builds binary)
 
 docfiles.files += doc/*
-docfiles.path = /usr/share/doc/mindforger/
+docfiles.path = $$PREFIX/share/doc/mindforger/
 INSTALLS += docfiles
 
 manfiles.files += man/*
-manfiles.path = /usr/share/man/man1/
+manfiles.path = $$PREFIX/share/man/man1/
 INSTALLS += manfiles
 
 iconfiles.files += app/resources/icons/*
-iconfiles.path = /usr/share/icons/mindforger/
+iconfiles.path = $$PREFIX/share/icons/mindforger/
 INSTALLS += iconfiles
 
 # experiment w/ file
 shortcutfiles.files += app/resources/gnome-shell/mindforger.desktop
-shortcutfiles.path = /usr/share/applications/
+shortcutfiles.path = $$PREFIX/share/applications/
 INSTALLS += shortcutfiles
 
 # eof