Index: Makefile
--- Makefile.orig
+++ Makefile
@@ -13,14 +13,14 @@ INSTALL_PROGRAM=$(INSTALL) -Dm 755
 INSTALL_DATA=$(INSTALL) -m 644
 
 # Directories into which to install the various files
-bindir=$(DESTDIR)$(PREFIX)/bin
-sharedir=$(DESTDIR)$(PREFIX)/share
+bindir=$(PREFIX)/bin
+sharedir=$(PREFIX)/share
 mandir=$(DESTDIR)$(MANPATH2)/man1
 MAKEDIR=mkdir -p
 
 # Default Qmake Command For Ubuntu (and probably other Debian) distributions
 
-QMAKE_COMMAND := qmake
+QMAKE_COMMAND := qmake-qt5
 # For Fedora 32 and similar distributions, use the next line instead of the above.
 # QMAKE_COMMAND := /usr/bin/qmake-qt5