diff --git a/006.musl.build b/006.musl.build
index 201eb59..961746b 100644
--- a/006.musl.build
+++ b/006.musl.build
@@ -5,7 +5,7 @@ if is_build_script_done finished; then
 elif [ "x${3}" = "xno-complex" ]; then
 	# Musl: build (no-complex)
 	_install=install_no_complex;
-	set_build_dir musl-${PKG_MUSL_VERSION} ${TARGET}-${3};
+	set_build_dir musl-${PKG_MUSL_VERSION}-${3} cross;
 	fetch http://www.musl-libc.org/releases/musl-${PKG_MUSL_VERSION}.tar.gz	\
 		${PKG_MUSL_SHA256SUM};
 	if ! is_build_script_done extracted; then
@@ -22,7 +22,7 @@ elif [ "x${3}" = "xnative" ]; then
 else
 	# Musl: build (full)
 	_install=install;
-	set_build_dir musl-${PKG_MUSL_VERSION} ${TARGET};
+	set_build_dir musl-${PKG_MUSL_VERSION} cross;
 fi;
 if ! is_build_script_done configured; then
 	rm_if_exists -m -c ${_build_dir};
diff --git a/007.gcc.full.build b/007.gcc.full.build
index 68f7a15..999dd8b 100644
--- a/007.gcc.full.build
+++ b/007.gcc.full.build
@@ -5,7 +5,7 @@ if is_build_script_done finished; then
 elif [ "x${3}" = "xruntime" ]\
 ||   [ "x${3}" = "xfull" ]; then
 	export CFLAGS="${GCCFLAGS}" CXXFLAGS="${GCCFLAGS}";
-	set_build_dir cbb-gcc-${PKG_GCC_VERSION} ${TARGET};
+	set_build_dir cbb-gcc-${PKG_GCC_VERSION} cross;
 	cd ${_build_dir};
 	if [ "x${3}" = "xruntime" ]; then
 		# GCC, compiler runtime.
@@ -39,7 +39,7 @@ elif [ "x${3}" = "xruntime" ]\
 else
 	if [ "x${3}" = "xstage1" ]; then
 		# GCC, stage1.
-		set_build_dir cbb-gcc-${PKG_GCC_VERSION} ${TARGET};
+		set_build_dir cbb-gcc-${PKG_GCC_VERSION} cross;
 		export	cbb_ldflags_for_target=--sysroot=${PREFIX_TARGET}	\
 			cbb_sysroot_for_libgcc=${PREFIX_TARGET}			\
 			cbb_target=${TARGET}					\
diff --git a/100.perk.build b/100.perk.build
index f966813..c58eddc 100644
--- a/100.perk.build
+++ b/100.perk.build
@@ -2,13 +2,14 @@ if is_build_script_done finished; then
         exit 212;
 else
 	fetch_git perk ${GITROOT}/perk;
+	set_build_dir ${2} native;
 fi;
 if ! is_build_script_done configured1; then
-	rm_if_exists -m -c perk-build;
+	rm_if_exists -m -c ${_build_dir};
 	../perk/configure;
 	set_build_script_done configured1 -built1;
 else
-	cd perk-build;
+	cd ${_build_dir};
 fi;
 if ! is_build_script_done built1; then
 	make;
@@ -18,12 +19,13 @@ if ! is_build_script_done installed1; then
 	make DESTDIR=${PREFIX} install;
 	set_build_script_done installed1 -configured2;
 fi;
+set_build_dir ${2} cross;
 if ! is_build_script_done configured2; then
-	rm_if_exists -m -c ../perk-build-${TARGET};
+	rm_if_exists -m -c ../${_build_dir};
 	../perk/configure --target=${TARGET};
 	set_build_script_done configured2 -built2;
 else
-	cd ../perk-build-${TARGET};
+	cd ../${_build_dir};
 fi;
 if ! is_build_script_done built2; then
 	make;
diff --git a/101.gmp.build b/101.gmp.build
index 1a09328..61e874d 100644
--- a/101.gmp.build
+++ b/101.gmp.build
@@ -1,30 +1,11 @@
-libelf_install_post() {
-	rm -f lib/libelf.def || return 1;
-	echo EXPORTS > lib/libelf.def || return 2;
-	perk -e lib/libelf.so >> lib/libelf.def || return 3;
-	${HOST_NATIVE}-dlltool			\
-		--output-lib lib/libelf.lib.a	\
-		--dllname libelf.so		\
-		--input-def lib/libelf.def || return 4;
-	cp lib/libelf.lib.a ${PREFIX}/lib || return 5;
-};
-
-parse_with_pkg_name ${2} 										\
-	https://gmplib.org/download/gmp/gmp-${PKG_GMP_VERSION}.tar.bz2					\
-		_configure_extra_args=--disable-assembly:_prefix_extra=${PREFIX_TARGET}			\
-	ftp://ftp.gnu.org/gnu/mpfr/mpfr-${PKG_MPFR_VERSION}.tar.bz2					\
-		_configure_extra_args=--with-gmp=${PREFIX_NATIVE}:_prefix_extra=${PREFIX_TARGET}	\
-	ftp://ftp.gnu.org/gnu/mpc/mpc-${PKG_MPC_VERSION}.tar.gz						\
-		_configure_extra_args=--with-gmp=${PREFIX_NATIVE},--with-mpfr=${PREFIX_NATIVE}:_prefix_extra=${PREFIX_TARGET}\
-	http://www.mr511.de/software/libelf-${PKG_LIBELF_VERSION}.tar.gz				\
-		_no_libtool_midipix=1:_prefix=${PREFIX_NATIVE}:CC=${HOST_NATIVE}-gcc:DESTDIR=		\
-	ftp://sourceware.org/pub/binutils/snapshots/binutils-${PKG_BINUTILS_VERSION}.tar.bz2		\
-		_configure_extra_args=--with-libelf=${PREFIX_NATIVE},--with-gmp=${PREFIX_NATIVE},--with-mpc=${PREFIX_NATIVE},--with-mpfr=${PREFIX_NATIVE},--with-sysroot=/;
-
+parse_with_pkg_name ${2} gmp mpfr mpc libelf binutils;
+[ -n "${_pkg_CC}" ] && export CC="${_pkg_CC}";
+[ -n "${_pkg_CFLAGS}" ] && export CFLAGS="${_pkg_CFLAGS}";
 if is_build_script_done finished; then
         exit 212;
 else
 	fetch ${_pkg_url} ${_pkg_sha256sum};
+	set_build_dir ${_pkg_subdir} native;
 fi;
 if ! is_build_script_done extracted; then
 	rm_if_exists ${_pkg_subdir};
@@ -34,22 +15,21 @@ fi;
 if ! is_build_script_done patched; then
 	patch -d ${_pkg_subdir} -p1		\
 		< portage/${_pkg_subdir}.midipix.patch;
-	if [ ${_no_libtool_midipix:-0} -eq 0 ]; then
-		cp portage/libtool.midipix ${_pkg_subdir}/;
+	if [ ${_pkg_no_libtool_midipix:-0} -eq 0 ]; then
+		cp -a portage/libtool.midipix ${_pkg_subdir}/;
 	fi;
 	set_build_script_done patched -configured;
 fi;
 if ! is_build_script_done configured; then
-	rm_if_exists -c -m ${_pkg_subdir}-build-native${3:+-${3}};
-	run_configure_with_extra_args		\
+	rm_if_exists -m -c ${_build_dir};
 	../${_pkg_subdir}/configure		\
-		"${_configure_extra_args}"	\
+		${_pkg_configure_extra_args}	\
 		--host=${HOST_NATIVE}		\
-		--prefix=${_prefix:-/}		\
+		--prefix=${_pkg_prefix:-/}	\
 		--target=${TARGET};
 	set_build_script_done configured -built;
 else
-	cd ${_pkg_subdir}-build-native${3:+-${3}};
+	cd ${_build_dir};
 fi;
 if ! is_build_script_done built; then
 	make;
@@ -59,9 +39,21 @@ if ! is_build_script_done installed1; then
 	make DESTDIR=${PREFIX_NATIVE} install;
 	set_build_script_done configured installed1 -installed2 -finished;
 fi;
-if [ -n ${_prefix_extra} ]; then
+if [ -n "${_pkg_prefix_extra}" ]; then
+	if ! is_build_script_done installed2; then
+		make DESTDIR=${_pkg_prefix_extra} install;
+		set_build_script_done configured installed2 -finished;
+	fi;
+elif [ "x${_pkg_name}" = "xlibelf" ]; then
 	if ! is_build_script_done installed2; then
-		make DESTDIR=${_prefix_extra} install;
+		rm -f lib/libelf.def;
+		echo EXPORTS > lib/libelf.def;
+		perk -e lib/libelf.so >> lib/libelf.def;
+		${HOST_NATIVE}-dlltool			\
+			--output-lib lib/libelf.lib.a	\
+			--dllname libelf.so		\
+			--input-def lib/libelf.def;
+		cp lib/libelf.lib.a ${PREFIX}/lib;
 		set_build_script_done configured installed2 -finished;
 	fi;
 fi;
diff --git a/200.coreutils.build b/200.coreutils.build
index 2eaf442..89f0317 100644
--- a/200.coreutils.build
+++ b/200.coreutils.build
@@ -1,29 +1,21 @@
 export CFLAGS="${CFLAGS_PACKAGES}";
-parse_with_pkg_name ${2}								\
-	https://ftp.gnu.org/gnu/coreutils/coreutils-${PKG_COREUTILS_VERSION}.tar.xz ""	\
-	https://ftp.gnu.org/gnu/diffutils/diffutils-${PKG_DIFFUTILS_VERSION}.tar.xz ""	\
-	http://alpha.gnu.org/gnu/findutils/findutils-${PKG_FINDUTILS_VERSION}.tar.gz	\
-		"CFLAGS=${CFLAGS:+${CFLAGS} }-Dendpwent=setpwent"			\
-	https://ftp.gnu.org/gnu/patch/patch-${PKG_PATCH_VERSION}.tar.gz ""		\
-	https://ftp.gnu.org/gnu/gawk/gawk-${PKG_GAWK_VERSION}.tar.xz ""			\
-	https://ftp.gnu.org/gnu/bash/bash-${PKG_BASH_VERSION}.tar.gz			\
-		_configure_extra_args=--without-bash-malloc				\
-	https://ftp.gnu.org/gnu/make/make-${PKG_MAKE_VERSION}.tar.bz2 ""		\
-	https://ftp.gnu.org/gnu/grep/grep-${PKG_GREP_VERSION}.tar.xz ""			\
-	https://ftp.gnu.org/gnu/sed/sed-${PKG_SED_VERSION}.tar.bz2 ""			\
-	ftp://sourceware.org/pub/binutils/snapshots/binutils-${PKG_BINUTILS_VERSION}.tar.bz2 "";
-
+parse_with_pkg_name ${2}			\
+	coreutils diffutils findutils patch	\
+	gawk bash make grep sed binutils;
 if is_build_script_done finished; then
         exit 212;
 else
 	fetch ${_pkg_url} ${_pkg_sha256sum};
 	if [ "x${_pkg_name}" = "xbinutils" ]\
 	&& [ "x${3}" = "xhost" ]; then
-		_configure_args="--disable-werror,--prefix=${PREFIX},--with-sysroot=${PREFIX_TARGET}";
-		_no_config_cache=${_no_prefix:=1}; _target=${TARGET};
+		_no_config_cache=1; _no_destdir=1;
+		_configure_args="--disable-werror --prefix=${PREFIX} --with-sysroot=${PREFIX_TARGET}";
+		set_build_dir ${_pkg_subdir} cross;
 	else
-		_configure_args="-C,--host=${HOST_NATIVE},--prefix=${_configure_extra_args:+,${_configure_extra_args}}";
+		_configure_args="-C --host=${HOST_NATIVE} --prefix=";
+		set_build_dir ${_pkg_subdir} native;
 	fi;
+	_configure_args="${_configure_args}${_pkg_configure_extra_args:+ ${_pkg_configure_extra_args}}";
 fi;
 if ! is_build_script_done extracted; then
 	rm_if_exists ${_pkg_subdir};
@@ -36,23 +28,21 @@ if ! is_build_script_done patched; then
 	set_build_script_done patched -configured;
 fi;
 if ! is_build_script_done configured; then
-	rm_if_exists -c -m ${_pkg_subdir}-build-${_target:-native};
+	rm_if_exists -m -c ${_build_dir};
 	[ ${_no_config_cache:-0} -eq 0 ] &&\
 		cp -a ../portage/config.cache .;
-	run_configure_with_extra_args			\
-		../${_pkg_subdir}/configure		\
-		"${_configure_args}"			\
-		--target=${TARGET};
+	../${_pkg_subdir}/configure		\
+		${_configure_args} --target=${TARGET};
 	set_build_script_done configured -built;
 else
-	cd ${_pkg_subdir}-build-${_target:-native};
+	cd ${_build_dir};
 fi;
 if ! is_build_script_done built; then
 	make ${MAKEFLAGS};
 	set_build_script_done built -installed;
 fi;
 if ! is_build_script_done installed; then
-	if [ ${_no_prefix:-0} -eq 0 ]; then
+	if [ ${_no_destdir:-0} -eq 0 ]; then
 		make ${MAKEFLAGS} DESTDIR=${PREFIX_NATIVE} install;
 	else
 		make ${MAKEFLAGS} install;
diff --git a/207.libz.build b/207.libz.build
index 2c29870..4afb479 100644
--- a/207.libz.build
+++ b/207.libz.build
@@ -18,7 +18,7 @@ if ! is_build_script_done extracted; then
 	set_build_script_done extracted -patched;
 fi;
 if ! is_build_script_done configured; then
-	set_build_dir ${_pkg_fname%%-*} ${TARGET};
+	set_build_dir ${_pkg_fname%%-*} native;
 	rm_if_exists -c -m ${_build_dir};
 	cp -a ../portage/config.cache .;
 	CFLAGS="${CFLAGS_PACKAGES}"		\
@@ -27,6 +27,8 @@ if ! is_build_script_done configured; then
 		--prefix=			\
 		--target=${TARGET};
 	set_build_script_done configured -built;
+else
+	cd ${_build_dir};
 fi;
 if ! is_build_script_done built; then
 	if [ "x${3}" = "xlibz" ]; then
diff --git a/build.sh b/build.sh
index fbb5e7b..736222d 100755
--- a/build.sh
+++ b/build.sh
@@ -3,7 +3,7 @@
 {
 unset AR ARFLAGS CC CFLAGS CXX CXXFLAGS LD LDFLAGS;
 . ./build.vars; . ./build.subr;
-check_prereqs git make openssl sed tar wget;
+check_prereqs git make openssl sed tar tr wget;
 log_msg info "Build started by ${USER}@$(hostname).";
 #trap
 (set -o errexit; mkdir -p ${PREFIX} ${WORKDIR});
diff --git a/build.subr b/build.subr
index 2020d21..c7f05bb 100644
--- a/build.subr
+++ b/build.subr
@@ -81,19 +81,23 @@ log_msg() {
 parse_with_pkg_name() {
 	_pkg_name=${1}; shift;
 	while [ $# -ge 0 ]; do
-		_pkg_url=${1}; _envvs="${2}"; _pkg_fname=${_pkg_url##*/};
-		if [ "x${_pkg_fname%%-*}" = "x${_pkg_name}" ]; then
-			_IFS="${IFS}"; IFS=:;
-			for _envv in ${_envvs}; do
-				export ${_envv};
-			done; IFS="${_IFS}"; unset _envvs _envv;
+		if [ "x${_pkg_name}" = "x${1}" ]; then
+			_pkg_NAME=$(echo "${_pkg_name}" | tr a-z A-Z);
+			eval	_pkg_configure_extra_args=\"\${PKG_${_pkg_NAME}_CONFIGURE_EXTRA_ARGS}\"\
+				_pkg_no_libtool_midipix=\${PKG_${_pkg_NAME}_NO_LIBTOOL_MIDIPIX}\
+				_pkg_prefix=\${PKG_${_pkg_NAME}_PREFIX}\
+				_pkg_prefix_extra=\${PKG_${_pkg_NAME}_PREFIX_EXTRA}\
+				_pkg_sha256sum=\${PKG_${_pkg_NAME}_SHA256SUM}\
+				_pkg_url=\${PKG_${_pkg_NAME}_URL}\
+				_pkg_version=\${PKG_${_pkg_NAME}_VERSION}\
+				_pkg_CC=\${PKG_${_pkg_NAME}_CC}\
+				_pkg_CFLAGS=\${PKG_${_pkg_NAME}_CFLAGS}\
+				_pkg_DESTDIR=\${PKG_${_pkg_NAME}_DESTDIR};
+			_pkg_fname=${_pkg_url##*/};
 			_pkg_subdir=${_pkg_fname%%.tar*};
-			eval _pkg_sha256sum=\${PKG_$(echo "${_pkg_name}" |\
-				tr a-z A-Z)_SHA256SUM};
-			return;
-		fi; shift 2;
-	done;
-	unset _pkg_name _pkg_url _envvs _pkg_fname _envv _IFS _pkg_subdir;
+			return 0;
+		fi; shift;
+	done; return 1;
 };
 
 rm_if_exists() {
@@ -111,14 +115,8 @@ rm_if_exists() {
 	fi;
 };
 
-run_configure_with_extra_args() {
-	_IFS="${IFS}"; IFS=","; _script=${1}; _extra_args="${2}";
-	shift 2; ${_script} "${@}" ${_extra_args}; IFS="${_IFS}";
-	unset _script _extra_args;
-};
-
 set_build_dir() {
-	export _build_dir=${1}-build-${2};
+	_build_dir=${1}-${2}-${TARGET};
 };
 
 set_env_vars() {
diff --git a/build.vars b/build.vars
index f12a94c..85f0012 100644
--- a/build.vars
+++ b/build.vars
@@ -8,52 +8,80 @@
 : ${CFLAGS_PACKAGES:=-g3 -O0};
 : ${GITROOT:=git://midipix.org};
 : ${HOST_NATIVE:=x86_64-nt64-midipix};
+: ${PREFIX:=${HOME}/midipix};
+: ${PREFIX_NATIVE:=${PREFIX}/native};
 : ${TARGET:=x86_64-nt64-midipix};
+: ${PREFIX_TARGET:=${PREFIX}/${TARGET}};
+: ${WORKDIR:=${PREFIX}/tmp};
+MAKEFLAGS="-j8${MAKEFLAGS:+ ${MAKEFLAGS}}";
+export PATH="${PREFIX}/bin${PATH:+:${PATH}}";
+TIMESTAMP_FMT="%Y/%m/%d %H:%M:%S";
 
+: ${PKG_BASH_CONFIGURE_EXTRA_ARGS:=--without-bash-malloc};
 : ${PKG_BASH_SHA256SUM:=afc687a28e0e24dc21b988fa159ff9dbcf6b7caa92ade8645cc6d5605cd024d4};
 : ${PKG_BASH_VERSION:=4.3};
+: ${PKG_BASH_URL:=https://ftp.gnu.org/gnu/bash/bash-${PKG_BASH_VERSION}.tar.gz};
 : ${PKG_BINUTILS_SHA256SUM:=250d3b2925c6b211fb16173b0b25bc091c58829fbcad3eb849645e0af52cf7fa};
 : ${PKG_BINUTILS_VERSION:=2.24.51};
+: ${PKG_BINUTILS_URL:=ftp://sourceware.org/pub/binutils/snapshots/binutils-${PKG_BINUTILS_VERSION}.tar.bz2};
+: ${PKG_CBB_CONFIGURE_EXTRA_ARGS:=--with-libelf=${PREFIX_NATIVE} --with-gmp=${PREFIX_NATIVE} --with-mpc=${PREFIX_NATIVE} --with-mpfr=${PREFIX_NATIVE} --with-sysroot=/};
 : ${PKG_CBB_VERSION:=cbb-gcc-4.6.4};
 : ${PKG_COREUTILS_SHA256SUM:=ec43ca5bcfc62242accb46b7f121f6b684ee21ecd7d075059bf650ff9e37b82d};
 : ${PKG_COREUTILS_VERSION:=8.23};
+: ${PKG_COREUTILS_URL:=https://ftp.gnu.org/gnu/coreutils/coreutils-${PKG_COREUTILS_VERSION}.tar.xz};
 : ${PKG_DIFFUTILS_SHA256SUM:=a25e89a8ab65fded1731e4186be1bb25cda967834b6df973599cdcd5abdfc19c};
 : ${PKG_DIFFUTILS_VERSION:=3.3};
+: ${PKG_DIFFUTILS_URL:=https://ftp.gnu.org/gnu/diffutils/diffutils-${PKG_DIFFUTILS_VERSION}.tar.xz};
+: ${PKG_FINDUTILS_CFLAGS:="${CFLAGS:+${CFLAGS} }-Dendpwent=setpwent"};
 : ${PKG_FINDUTILS_SHA256SUM:=0de3cf625a5c9f154eee3171e072515ffdde405244dd00502af617ac57b73ae2};
 : ${PKG_FINDUTILS_VERSION:=4.5.14};
+: ${PKG_FINDUTILS_URL:=http://alpha.gnu.org/gnu/findutils/findutils-${PKG_FINDUTILS_VERSION}.tar.gz};
 : ${PKG_GAWK_SHA256SUM:=e3cf55e91e31ea2845f8338bedd91e40671fc30e4d82ea147d220e687abda625};
 : ${PKG_GAWK_VERSION:=4.1.3};
+: ${PKG_GAWK_URL:=https://ftp.gnu.org/gnu/gawk/gawk-${PKG_GAWK_VERSION}.tar.xz};
 : ${PKG_GCC_VERSION:=4.6.4};
+: ${PKG_GMP_CONFIGURE_EXTRA_ARGS:=--disable-assembly};
+: ${PKG_GMP_PREFIX_EXTRA:=${PREFIX_TARGET}};
 : ${PKG_GMP_SHA256SUM:=752079520b4690531171d0f4532e40f08600215feefede70b24fabdc6f1ab160};
 : ${PKG_GMP_VERSION:=5.1.3};
+: ${PKG_GMP_URL:=https://gmplib.org/download/gmp/gmp-${PKG_GMP_VERSION}.tar.bz2};
 : ${PKG_GREP_SHA256SUM:=ca91d22f017bfcb503d4bc3b44295491c89a33a3df0c3d8b8614f2d3831836eb};
 : ${PKG_GREP_VERSION:=2.22};
+: ${PKG_GREP_URL:=https://ftp.gnu.org/gnu/grep/grep-${PKG_GREP_VERSION}.tar.xz};
 : ${PKG_GZIP_SHA256SUM:=1ca41818a23c9c59ef1d5e1d00c0d5eaa2285d931c0fb059637d7c0cc02ad967};
 : ${PKG_GZIP_VERSION:=1.2.4};
+: ${PKG_GZIP_URL:=https://ftp.gnu.org/gnu/gzip/gzip-${PKG_GZIP_VERSION}.tar.gz};
+: ${PKG_LIBELF_CC:=${HOST_NATIVE}-gcc};
+: ${PKG_LIBELF_DESTDIR:=};
+: ${PKG_LIBELF_NO_LIBTOOL_MIDIPIX:=1};
+: ${PKG_LIBELF_PREFIX:=${PREFIX_NATIVE}};
 : ${PKG_LIBELF_SHA256SUM:=591a9b4ec81c1f2042a97aa60564e0cb79d041c52faa7416acb38bc95bd2c76d};
 : ${PKG_LIBELF_VERSION:=0.8.13};
+: ${PKG_LIBELF_URL:=http://www.mr511.de/software/libelf-${PKG_LIBELF_VERSION}.tar.gz};
 : ${PKG_LIBZ_SHA256SUM:=33e65f22ec3d3e3f87436e53f82eb114054cd3aa373dc0480625dd92806fd9a0};
 : ${PKG_LIBZ_VERSION:=1.2.8.2015.05.20};
+: ${PKG_LIBZ_URL:=https://sortix.org/libz/release/libz-${PKG_LIBZ_VERSION}.tar.gz};
 : ${PKG_MAKE_SHA256SUM:=f3e69023771e23908f5d5592954d8271d3d6af09693cecfd29cee6fde8550dc8};
 : ${PKG_MAKE_VERSION:=3.81};
+: ${PKG_MAKE_URL:=https://ftp.gnu.org/gnu/make/make-${PKG_MAKE_VERSION}.tar.bz2};
+: ${PKG_MPC_CONFIGURE_EXTRA_ARGS:=--with-gmp=${PREFIX_NATIVE} --with-mpfr=${PREFIX_NATIVE}};
+: ${PKG_MPC_PREFIX_EXTRA:=${PREFIX_TARGET}};
 : ${PKG_MPC_SHA256SUM:=ed5a815cfea525dc778df0cb37468b9c1b554aaf30d9328b1431ca705b7400ff};
 : ${PKG_MPC_VERSION:=1.0.1};
+: ${PKG_MPC_URL:=ftp://ftp.gnu.org/gnu/mpc/mpc-${PKG_MPC_VERSION}.tar.gz};
+: ${PKG_MPFR_CONFIGURE_EXTRA_ARGS:=--with-gmp=${PREFIX_NATIVE}};
+: ${PKG_MPFR_PREFIX_EXTRA:=${PREFIX_TARGET}};
 : ${PKG_MPFR_SHA256SUM:=79c73f60af010a30a5c27a955a1d2d01ba095b72537dab0ecaad57f5a7bb1b6b};
 : ${PKG_MPFR_VERSION:=3.1.2};
+: ${PKG_MPFR_URL:=ftp://ftp.gnu.org/gnu/mpfr/mpfr-${PKG_MPFR_VERSION}.tar.bz2};
 : ${PKG_MUSL_SHA256SUM:=720b83c7e276b4b679c0bffe9509340d5f81fd601508e607e708177df0d31c0e};
 : ${PKG_MUSL_VERSION:=1.1.12};
+: ${PKG_MUSL_URL:=http://www.musl-libc.org/releases/musl-${PKG_MUSL_VERSION}.tar.gz};
 : ${PKG_PATCH_SHA256SUM:=59c29f56faa0a924827e6a60c6accd6e2900eae5c6aaa922268c717f06a62048};
 : ${PKG_PATCH_VERSION:=2.7};
+: ${PKG_PATCH_URL:=https://ftp.gnu.org/gnu/patch/patch-${PKG_PATCH_VERSION}.tar.gz};
 : ${PKG_SED_SHA256SUM:=f048d1838da284c8bc9753e4506b85a1e0cc1ea8999d36f6995bcb9460cddbd7};
 : ${PKG_SED_VERSION:=4.2.2};
-
-: ${PREFIX:=${HOME}/midipix};
-: ${PREFIX_NATIVE:=${PREFIX}/native};
-: ${PREFIX_TARGET:=${PREFIX}/${TARGET}};
-: ${WORKDIR:=${PREFIX}/tmp};
-
-MAKEFLAGS="-j8${MAKEFLAGS:+ ${MAKEFLAGS}}";
-export PATH="${PREFIX}/bin${PATH:+:${PATH}}";
-TIMESTAMP_FMT="%Y/%m/%d %H:%M:%S";
+: ${PKG_SED_URL:=https://ftp.gnu.org/gnu/sed/sed-${PKG_SED_VERSION}.tar.bz2};
 
 # vim:filetype=sh