idk, getting the hl2.exe pid in the makefile block doesn't seem to work

Makefile

@@ -57,6 +57,8 @@ GMAD_TAR_BIN?=$(PYTHON_BIN) ./contrib/gmad-tar
 GMAD_TAR_FLAGS?=
 MOUNT_BIN?=$(PYTHON_BIN) ./contrib/mount
 MOUNT_FLAGS?=--mod-dir "'$(MOD_DIR)'"
+WINPGREP_BIN?=./contrib/winpgrep
+WINPGREP_FLAGS?=
 
 %_p.bsp: %.bsp
 	$(BSPZIP_BIN) -addlist $^ $(^:.bsp=.bspzip-addlist) $@ $(BSPZIP_FLAGS)
@@ -179,10 +181,10 @@ maps/%.bsp: %.bsp
 	$(SHLEX_BIN) $(SHLEX_FLAGS) $(SHLEX_HL2LOG_FLAGS) \
 		"'$(GAME_DIR)$(GAME)'" -allowdebug $(VBIN_FLAGS) $(GAME_FLAGS) $(GAME_TTT_FLAGS) \
 		+sv_cheats 1 +nav_edit 1 +map navgen &
-	sleep 30
+	sleep 2
 	$(SHLEX_BIN) $(SHLEX_FLAGS) $(EPOLL_THEN_BIN) $(EPOLL_THEN_FLAGS) \
-		--literal ng_f  --file "'$(MOD_DIR)/data/runme.txt'" --timeout-sec 1800 -- \
-		kill $(shell tasklist | grep hl2.exe | sed -re 's,^hl2.exe  *([0-9][0-9]*).*$$,\1,')
+		--literal "''"  --file "'$(MOD_DIR)/data/runme.txt'" --timeout-sec 1800 -- \
+		taskkill -f -pid "$(shell $(WINPGREP_BIN) $(WINPGREP_FLAGS) hl2.exe )"
 	# ^ watch "$(MOD_DIR)/data/runme.txt" for content "ng_f", when match: kill hl2.exe
 	#   timeout: 30min
 	cp -v "$(MOD_DIR)/maps/navgen.nav" $@
@@ -216,7 +218,7 @@ maps/%.bsp: %.bsp
 	#	addons-src/materials/vgui/maps/*.vtf
 	# 	addons-src/maps/*.res
 	# $(GMAD_BIN) $(GMAD_FLAGS) create -folder "addons-src" -out "$@"
-addons/%.gma: %.bsp %.nav %.cubehdr addons-src/addon.json
+addons/%.gma: %.bsp %.cubehdr addons-src/addon.json
 	rm -rv \
 		addons-src/maps/*.bsp \
 		addons-src/maps/thumb/*.png \
@@ -275,3 +277,6 @@ fast: lint maps/ttt_terrorcon_v2_fast.bsp ttt_terrorcon_v2_fast.game
 
 lint: ttt_terrorcon_v2.bspzip-addlist
 	$(PYTHON_BIN) ./contrib/bspzip-lint $^ 2>&1 | tee $^.lint
+
+hl2pid:
+	$(WINPGREP_BIN) $(WINPGREP_FLAGS) hl2.exe