diff --git a/GNUmakefile b/GNUmakefile
index 69b810da..48aa5867 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -1,4 +1,4 @@
-# This makefile is for GNU Make 3.80 or above, and nowadays provided
+# This makefile is for GNU Make 3.81 or above, and nowadays provided
 # just for compatibility and preservation of traditions.
 #
 # Please use CMake in case of any difficulties or
@@ -16,6 +16,7 @@ ifneq ($(make_lt_3_81),0)
 $(error Please use GNU Make 3.81 or above)
 endif
 make_ge_4_1   := $(shell expr "$(MAKE_VERx3)" ">=" "  4  1")
+make_ge_4_4   := $(shell expr "$(MAKE_VERx3)" ">=" "  4  4")
 SRC_PROBE_C   := $(shell [ -f mdbx.c ] && echo mdbx.c || echo src/osal.c)
 SRC_PROBE_CXX := $(shell [ -f mdbx.c++ ] && echo mdbx.c++ || echo src/mdbx.c++)
 UNAME         := $(shell uname -s 2>/dev/null || echo Unknown)
@@ -81,6 +82,13 @@ LDFLAGS      ?= $(eval LDFLAGS := $$(shell $$(uname2ldflags)))$(LDFLAGS)
 LIB_STDCXXFS ?= $(eval LIB_STDCXXFS := $$(shell echo '$$(cxx_filesystem_probe)' | cat mdbx.h++ - | sed $$$$'1s/\xef\xbb\xbf//' | $(CXX) -x c++ $(CXXFLAGS) -Wno-error - -Wl,--allow-multiple-definition -lstdc++fs $(LIBS) $(LDFLAGS) $(EXE_LDFLAGS) -o /dev/null 2>probe4lstdfs.err >/dev/null && echo '-Wl,--allow-multiple-definition -lstdc++fs'))$(LIB_STDCXXFS)
 endif
 
+ifneq ($(make_ge_4_4),1)
+.NOTPARALLEL:
+WAIT         =
+else
+WAIT         = .WAIT
+endif
+
 ################################################################################
 
 define uname2sosuffix
@@ -296,7 +304,7 @@ ifeq ($(wildcard mdbx.c),mdbx.c)
 # Amalgamated source code, i.e. distributed after `make dist`
 MAN_SRCDIR := man1/
 
-config.h: @buildflags.tag mdbx.c $(lastword $(MAKEFILE_LIST)) LICENSE NOTICE
+config.h: @buildflags.tag $(WAIT) mdbx.c $(lastword $(MAKEFILE_LIST)) LICENSE NOTICE
 	@echo '  MAKE $@'
 	$(QUIET)(echo '#define MDBX_BUILD_TIMESTAMP "$(MDBX_BUILD_TIMESTAMP)"' \
 	&& echo "#define MDBX_BUILD_FLAGS \"$$(cat @buildflags.tag)\"" \
@@ -544,7 +552,7 @@ src/version.c: src/version.c.in $(lastword $(MAKEFILE_LIST)) $(git_DIR)/HEAD $(g
 		-e "s|\$${MDBX_VERSION_REVISION}|$(MDBX_GIT_REVISION)|" \
 	src/version.c.in >$@
 
-src/config.h: @buildflags.tag src/version.c $(lastword $(MAKEFILE_LIST)) LICENSE NOTICE
+src/config.h: @buildflags.tag $(WAIT) src/version.c $(lastword $(MAKEFILE_LIST)) LICENSE NOTICE
 	@echo '  MAKE $@'
 	$(QUIET)(echo '#define MDBX_BUILD_TIMESTAMP "$(MDBX_BUILD_TIMESTAMP)"' \
 	&& echo "#define MDBX_BUILD_FLAGS \"$$(cat @buildflags.tag)\"" \
@@ -614,7 +622,7 @@ mdbx++-static.o: src/config.h src/mdbx.c++ mdbx.h mdbx.h++ $(lastword $(MAKEFILE
 	@echo '  CC $@'
 	$(QUIET)$(CXX) $(CXXFLAGS) $(MDBX_BUILD_OPTIONS) '-DMDBX_CONFIG_H="config.h"' -ULIBMDBX_EXPORTS -c src/mdbx.c++ -o $@
 
-dist: tags @dist-checked.tag libmdbx-sources-$(MDBX_VERSION_IDENT).tar.gz $(lastword $(MAKEFILE_LIST))
+dist: tags $(WAIT) @dist-checked.tag libmdbx-sources-$(MDBX_VERSION_IDENT).tar.gz $(lastword $(MAKEFILE_LIST))
 	@echo '  AMALGAMATION is done'
 
 tags: