diff --git a/build.sh b/build.sh
index e5f225f..8d6f209 100755
--- a/build.sh
+++ b/build.sh
@@ -95,6 +95,7 @@ buildp_init() {
 			"${DEFAULT_CHECK_PATH_VARS}"					\
 			"${DEFAULT_CLEAR_ENV_VARS_EXCEPT}"				\
 			"${DEFAULT_CLEAR_PREFIX_PATHS}"					\
+			"${DEFAULT_RPM_JOBS_SEMAPHORE}"					\
 			"${BUILD_DLCACHEDIR}" "${PREFIX}"				\
 			"${PREFIX_RPM}" "${BUILD_WORKDIR}";
 	then
diff --git a/midipix.env b/midipix.env
index 8b61288..ae5e185 100644
--- a/midipix.env
+++ b/midipix.env
@@ -176,13 +176,16 @@ rtl_get_var_unsafe \$DEFAULT_LDFLAGS_RUNTIME -u "DEFAULT_LDFLAGS_${BUILD_KIND}_R
 # Default command & tool flags & variables
 : ${DEFAULT_AUTOCONF_CONFIG_GUESS:="copy"};
 : ${DEFAULT_CMAKE_LISTFILE:="CMakeLists.txt"};
+: ${DEFAULT_GIT_ARGS:=""};
 : ${DEFAULT_GITROOT:=git://midipix.org};
 : ${DEFAULT_GITROOT_HEAD:=git://midipix.org};
 : ${DEFAULT_MAKE_INSTALL_VNAME:=DESTDIR};
 : ${DEFAULT_MAKEFLAGS_LOADAVG:="-l${DEFAULT_BUILD_CPUS}"};
 : ${DEFAULT_MAKEFLAGS_PARALLELISE:="-j${DEFAULT_BUILD_CPUS}"};
 : ${DEFAULT_MAKEFLAGS_VERBOSITY:="V=99 VERBOSE=1"};
-: ${DEFAULT_GIT_ARGS:=""};
+: ${DEFAULT_RPM_JOBS_MAX:=1};
+: ${DEFAULT_RPM_JOBS_SEMAPHORE:="${BUILD_WORKDIR}/rpm.jobs"};
+: ${DEFAULT_RPM_JOBS_WAIT:=8};
 : ${DEFAULT_TIMESTAMP_FMT:="%Y/%m/%d %H:%M:%S"};
 : ${DEFAULT_WGET_ARGS:="--no-check-certificate --timeout=25 --waitretry=16"};
 : ${DEFAULT_ZIPDIST_DEFROOT:="/dev/fs/c/midipix"};
diff --git a/subr.ex/ex_init.subr b/subr.ex/ex_init.subr
index 71bcc67..61d2676 100644
--- a/subr.ex/ex_init.subr
+++ b/subr.ex/ex_init.subr
@@ -244,6 +244,7 @@ ex_init_help() {
 # @_check_path_vars:			list of pathname variables to check
 # @_clear_env_vars_except:		list of environment variables to not unset when clearing the environment
 # @_clear_prefix_paths:			list of directory pathnames to clear in the top-level prefix
+# @_rpm_semaphore:			absolute pathname to rpmbuild(1) parallel jobs count semaphore
 # @_dlcachedir:				absolute pathname to download cache directory
 # @_prefix:				absolute pathname to top-level prefix
 # @_prefix_rpm:				absolute pathname to RPM files prefix
@@ -256,8 +257,8 @@ ex_init_files() {
 		_eif_build_log_fname="${4}" _eif_build_log_last_fname="${5}"			\
 		_eif_build_status_in_progress_fname="${6}" _eif_check_path_vars="${7}"		\
 		_eif_clear_env_vars_except="${8}" _eif_clear_prefix_paths="${9}"		\
-		_eif_dlcachedir="${10}" _eif_prefix="${11}" _eif_prefix_rpm="${12}"		\
-		_eif_workdir="${13}"								\
+		_eif_rpm_semaphore="${10}" _eif_dlcachedir="${11}" _eif_prefix="${12}"		\
+		_eif_prefix_rpm="${13}" _eif_workdir="${14}"					\
 		_eif_log_last_fname="" _eif_log_last_num=1 _eif_rc=0;
 
 	if ! rtl_fileop mkdir "${_eif_dlcachedir}" "${_eif_workdir}"\
@@ -287,7 +288,11 @@ ex_init_files() {
 			rtl_fileop ln_symbolic "${_eif_log_last_fname}" "${_eif_build_log_last_fname}";
 		fi;
 
-		rtl_fileop touch "${_eif_build_log_fname}"; rtl_log_set_fname "${_eif_build_log_fname}";
+		rtl_fileop touch "${_eif_build_log_fname}";
+		rtl_log_set_fname "${_eif_build_log_fname}";
+
+		rtl_fileop rm "${_eif_rpm_semaphore}";
+
 		if rtl_lmatch "${_eif_rclean_builds}" $"prefix" ","; then
 			trap "rm -f \"${_eif_build_status_in_progress_fname}\" 2>/dev/null;
 
diff --git a/subr.pkg/pkg_install_rpm.subr b/subr.pkg/pkg_install_rpm.subr
index c5ddf80..83b6841 100644
--- a/subr.pkg/pkg_install_rpm.subr
+++ b/subr.pkg/pkg_install_rpm.subr
@@ -18,7 +18,8 @@ pkg_install_rpm() {
 			"${PKG_VERSION:-}" || return 1;
 		ex_rtl_build_rpm							\
 			"${PKG_DESTDIR}"						\
-			1 "${BUILD_WORKDIR}/rpm.jobs" 8 				\
+			"${DEFAULT_RPM_JOBS_MAX}" "${DEFAULT_RPM_JOBS_SEMAPHORE}"	\
+			"${DEFAULT_RPM_JOBS_WAIT}"					\
 			"${PKG_NAME}"							\
 			"${PREFIX_RPM}"							\
 			"${MIDIPIX_BUILD_PWD}/etc/package.spec"				\