--- a/configure
+++ b/configure
@@ -881,11 +881,11 @@ logfile="config.err"
 
 # installation paths
 prefix="/usr/local"
-libdir='$(PREFIX)/lib'
+libdir='${prefix}/lib'
 shlibdir="$libdir"
-incdir='$(PREFIX)/include'
-mandir='$(PREFIX)/share/man'
-bindir='$(PREFIX)/bin'
+incdir='${prefix}/include'
+mandir='${prefix}/share/man'
+bindir='${prefix}/bin'
 
 # toolchain
 cc="gcc"
@@ -1936,8 +1936,7 @@ echo "#ifndef FFMPEG_CONFIG_H" >> $TMPH
 echo "#define FFMPEG_CONFIG_H" >> $TMPH
 echo "#define FFMPEG_CONFIGURATION \"$FFMPEG_CONFIGURATION\"" >> $TMPH
 
-echo "PREFIX=$prefix" >> config.mak
-echo "prefix=\$(DESTDIR)\$(PREFIX)" >> config.mak
+echo "prefix=$prefix" >> config.mak
 echo "LIBDIR=\$(DESTDIR)$libdir" >> config.mak
 echo "SHLIBDIR=\$(DESTDIR)$shlibdir" >> config.mak
 echo "INCDIR=\$(DESTDIR)$incdir" >> config.mak