enforce proper usage of --prefix

binutils/Makefile

@@ -3,7 +3,7 @@ prepare:
 	tar -xf binutils.tar.gz
 	cd binutils
 make:
-	@../configure --prefix=${PREFIX}/usr       \
+	@../configure --prefix=/usr       \
 				--enable-gold       \
 				--enable-ld=default \
 				--enable-plugins    \

bison/Makefile

@@ -3,7 +3,7 @@ prepare:
 	tar -xf bison.tar.gz
 	cd bison
 make:
-	@./configure --prefix=${PREFIX}/usr
+	@./configure --prefix=/usr
 	make
 install:
 	make install DESTDIR="${PREFIX}"

curl/Makefile

@@ -3,7 +3,7 @@ prepare:
 	tar -xf curl.tar.gz
 	cd curl
 make:
-	@./configure --prefix=${PREFIX}/usr --with-openssl
+	@./configure --prefix=/usr --with-openssl
 	make
 install:
 	make install DESTDIR="${PREFIX}"	

xorg/Makefile

@@ -3,7 +3,7 @@ prepare:
 	cd xserver
 xorg:
 	./configure \
-    --prefix=${PREFIX} \
+    --prefix=/usr \
     --localstatedir=/var \
     --disable-systemd-logind \
     --disable-xwayland \

xztools/Makefile

@@ -3,8 +3,8 @@ prepare:
 	cd xz
 make:
 	./configure \
-    --prefix=${PREFIX} \
-    --disable-nls 
+		--prefix=/usr \
+		--disable-nls 
 	make
 install:
 	make install DESTDIR="${PREFIX}"