Index: src/build-data/makefile/unix.in
===================================================================
--- src/build-data/makefile/unix.in.orig	2011-06-21 17:33:59.550471797 +0200
+++ src/build-data/makefile/unix.in	2011-06-21 17:35:52.643901474 +0200
@@ -12,12 +12,12 @@ VERSION       = %{version}
 SERIES        = %{version_major}.%{version_minor}
 
 # Installation Settings
-DESTDIR       = %{prefix}
+DESTDIR       =
 
-BINDIR        = $(DESTDIR)/bin
-LIBDIR        = $(DESTDIR)/%{libdir}
-HEADERDIR     = $(DESTDIR)/%{includedir}/botan-$(SERIES)/botan
-DOCDIR        = $(DESTDIR)/%{docdir}/botan-$(VERSION)
+BINDIR        = $(DESTDIR)%{prefix}/bin
+LIBDIR        = $(DESTDIR)%{libdir}
+HEADERDIR     = $(DESTDIR)%{includedir}/botan-$(SERIES)/botan
+DOCDIR        = $(DESTDIR)%{docdir}/Botan-$(VERSION)
 PKGCONF_DIR   = $(LIBDIR)/pkgconfig
 
 CONFIG_SCRIPT = %{botan_config}
Index: src/build-data/makefile/unix_shr.in
===================================================================
--- src/build-data/makefile/unix_shr.in.orig	2011-06-21 17:33:59.550471797 +0200
+++ src/build-data/makefile/unix_shr.in	2011-06-21 17:35:50.812926900 +0200
@@ -14,12 +14,12 @@ VERSION       = %{version}
 SERIES        = %{version_major}.%{version_minor}
 
 # Installation Settings
-DESTDIR       = %{prefix}
+DESTDIR       =
 
-BINDIR        = $(DESTDIR)/bin
-LIBDIR        = $(DESTDIR)/%{libdir}
-HEADERDIR     = $(DESTDIR)/%{includedir}/botan-$(SERIES)/botan
-DOCDIR        = $(DESTDIR)/%{docdir}/botan-$(VERSION)
+BINDIR        = $(DESTDIR)%{prefix}/bin
+LIBDIR        = $(DESTDIR)%{libdir}
+HEADERDIR     = $(DESTDIR)%{includedir}/botan-$(SERIES)/botan
+DOCDIR        = $(DESTDIR)%{docdir}/Botan-$(VERSION)
 PKGCONF_DIR   = $(LIBDIR)/pkgconfig
 
 CONFIG_SCRIPT = %{botan_config}
--- src/build-data/botan-config.in.orig	2016-05-13 00:45:07.618245779 +0200
+++ src/build-data/botan-config.in	2016-05-13 00:45:38.386439746 +0200
@@ -32,12 +32,12 @@ while test $# -gt 0; do
         exit 0
         ;;
     --cflags)
-        echo -I$prefix/$includedir
+        echo -I$includedir
         ;;
     --libs)
         if [ $prefix != "/usr" ]
         then
-           echo -L$prefix/$libdir -lbotan-%{version_major}.%{version_minor} %{link_to}
+           echo -L$libdir -lbotan-%{version_major}.%{version_minor} %{link_to}
         else
            echo -lbotan-%{version_major}.%{version_minor} %{link_to}
         fi