diff --git a/Makefile b/Makefile
index 7e9139c..6e73af9 100644
--- a/Makefile
+++ b/Makefile
@@ -13,17 +13,14 @@ MB_PROJ_META_WEBSITE ?= https://code.distributedrebirth.love/arch-msx/msxbuild
 .RECIPEPREFIX := _
 .DEFAULT_GOAL := @all
 -include Makelocal.mk
-include $(PATH_MSXBUILD)/msxbuild-prolog.mk
 include $(PATH_MSXBUILD)/msxbuild.mk
 $(call mb_make_call,mb_setup_default,$(PATH_BIN),$(PATH_SRC))
 
 # Optional: make faster and setup graph root
 .PHONY: Makefile
 .PHONY: Makelocal.mk
-.PHONY: $(PATH_MSXBUILD)/msxbuild-prolog.mk
 .PHONY: $(PATH_MSXBUILD)/msxbuild.mk
 Makefile:: Makelocal.mk
-Makefile:: $(PATH_MSXBUILD)/msxbuild-prolog.mk
 Makefile:: $(PATH_MSXBUILD)/msxbuild.mk
 @@include-root:: Makefile
 
diff --git a/lib/make/mb_env.mk b/lib/make/mb_env.mk
new file mode 100644
index 0000000..706fe12
--- /dev/null
+++ b/lib/make/mb_env.mk
@@ -0,0 +1,141 @@
+
+MB_ENV ?= on
+$(call mb_make_call,mb_doc_variable,MB_ENV,"Enables VERBOSE and DEBUG variable parsing.")
+
+
+#
+# Configure verbose mode
+#
+ifeq ("$(MB_ENV)", "on")
+	ifdef VERBOSE
+		ifeq ("$(VERBOSE)", "off")
+			.SILENT:
+		endif
+	endif
+	ifdef うるさい
+		ifeq ("$(うるさい)", "ユニット")
+			.SILENT:
+		endif
+	endif
+	ifdef LUIDRUCHTIG
+		ifeq ("$(LUIDRUCHTIG)", "uit")
+			.SILENT:
+		endif
+	endif
+	ifdef VERBOSA
+		ifeq ("$(VERBOSA)", "traje")
+			.SILENT:
+		endif
+	endif
+	ifdef VERBOSO
+		ifeq ("$(VERBOSO)", "traje")
+			.SILENT:
+		endif
+	endif
+	ifdef VERBEUSE
+		ifeq ("$(VERBEUSE)", "dehors")
+			.SILENT:
+		endif
+	endif
+	ifdef VERBEUX
+		ifeq ("$(VERBEUX)", "dehors")
+			.SILENT:
+		endif
+	endif
+	ifdef шумный
+		ifeq ("$(шумный)", "вне")
+			.SILENT:
+		endif
+	endif
+	ifdef 吵雜
+		ifeq ("$(吵雜)", "出去")
+			.SILENT:
+		endif
+	endif
+	ifdef वाचाल
+		ifeq ("$(वाचाल)", "बंद")
+			.SILENT:
+		endif
+	endif
+	ifdef ᕗᕉᑉᕉᔅ
+		ifeq ("$(ᕗᕉᑉᕉᔅ)", "ᖃᒥᓪᓗᒍ")
+			.SILENT:
+		endif
+	endif
+	ifndef VERBOSE
+		ifndef うるさい
+			ifndef LUIDRUCHTIG
+				ifndef VERBOSA
+					ifndef VERBOSO
+						ifndef VERBEUSE
+							ifndef VERBEUX
+								ifndef шумный
+									ifndef 吵雜
+										ifndef वाचाल
+											ifndef ᕗᕉᑉᕉᔅ
+												.SILENT:
+											endif
+										endif
+									endif
+								endif
+							endif
+						endif
+					endif
+				endif
+			endif
+		endif
+	endif
+endif
+
+
+#
+# Configure debug mode
+#
+ifeq ("$(MB_ENV)", "on")
+	ifdef DEBUG
+		ifneq ("$(DEBUG)", "off")
+			MB_MAKE_CALL_DEBUG := $(DEBUG)
+		endif
+	endif
+	ifdef ONTBEESTEN
+		ifneq ("$(ONTBEESTEN)", "uit")
+			MB_MAKE_CALL_DEBUG := $(ONTBEESTEN)
+		endif
+	endif
+	ifdef デバッグ
+		ifneq ("$(デバッグ)", "ユニット")
+			MB_MAKE_CALL_DEBUG := $(デバッグ)
+		endif
+	endif
+	ifdef DEPURAR
+		ifneq ("$(DEPURAR)", "traje")
+			MB_MAKE_CALL_DEBUG := $(DEPURAR)
+		endif
+	endif
+	ifdef DÉBOGUER
+		ifneq ("$(DÉBOGUER)", "dehors")
+			MB_MAKE_CALL_DEBUG := $(DÉBOGUER)
+		endif
+	endif
+	ifdef отлаживать
+		ifneq ("$(отлаживать)", "вне")
+			MB_MAKE_CALL_DEBUG := $(отлаживать)
+		endif
+	endif
+	ifdef 偵錯
+		ifneq ("$(偵錯)", "出去")
+			MB_MAKE_CALL_DEBUG := $(偵錯)
+		endif
+	endif
+	ifdef डिबग
+		ifneq ("$(डिबग)", "बंद")
+			MB_MAKE_CALL_DEBUG := $(डिबग)
+		endif
+	endif
+	ifdef ᐃᕿᒡᒐᖅᑐᖅ
+		ifneq ("$(ᐃᕿᒡᒐᖅᑐᖅ)", "ᖃᒥᓪᓗᒍ")
+			MB_MAKE_CALL_DEBUG := $(ᐃᕿᒡᒐᖅᑐᖅ)
+		endif
+	endif
+endif
+
diff --git a/lib/msxbuild-prolog.mk b/lib/msxbuild-prolog.mk
deleted file mode 100644
index 540aba5..0000000
--- a/lib/msxbuild-prolog.mk
+++ /dev/null
@@ -1,154 +0,0 @@
-#
-# Mandatory prolog to included before msxbuild.mk
-#
-
-
-#
-# Make make, make behave.
-#
-MAKEFLAGS += --no-builtin-rules
-MAKEFLAGS += --no-builtin-variables
-MAKEFLAGS += --warn-undefined-variables
-.DELETE_ON_ERROR :=
-.RECIPEPREFIX := $(if $(.RECIPEPREFIX),$(.RECIPEPREFIX),>)
-.SUFFIXES :=
-.ONESHELL :=
-.SHELLFLAGS := -e -u -o pipefail -c
-SHELL := bash
-ifeq ($(origin .RECIPEPREFIX), undefined)
-	$(error This version of make does not support dynamic white space brain fuck mode.)
-endif
-# === Below here is optional ===
-
-#
-# Configure verbose mode
-#
-ifdef VERBOSE
-	ifeq ("$(VERBOSE)", "off")
-		.SILENT:
-	endif
-endif
-ifdef うるさい
-	ifeq ("$(うるさい)", "ユニット")
-		.SILENT:
-	endif
-endif
-ifdef LUIDRUCHTIG
-	ifeq ("$(LUIDRUCHTIG)", "uit")
-		.SILENT:
-	endif
-endif
-ifdef VERBOSA
-	ifeq ("$(VERBOSA)", "traje")
-		.SILENT:
-	endif
-endif
-ifdef VERBOSO
-	ifeq ("$(VERBOSO)", "traje")
-		.SILENT:
-	endif
-endif
-ifdef VERBEUSE
-	ifeq ("$(VERBEUSE)", "dehors")
-		.SILENT:
-	endif
-endif
-ifdef VERBEUX
-	ifeq ("$(VERBEUX)", "dehors")
-		.SILENT:
-	endif
-endif
-ifdef шумный
-	ifeq ("$(шумный)", "вне")
-		.SILENT:
-	endif
-endif
-ifdef 吵雜
-	ifeq ("$(吵雜)", "出去")
-		.SILENT:
-	endif
-endif
-ifdef वाचाल
-	ifeq ("$(वाचाल)", "बंद")
-		.SILENT:
-	endif
-endif
-ifdef ᕗᕉᑉᕉᔅ
-	ifeq ("$(ᕗᕉᑉᕉᔅ)", "ᖃᒥᓪᓗᒍ")
-		.SILENT:
-	endif
-endif
-ifndef VERBOSE
-	ifndef うるさい
-		ifndef LUIDRUCHTIG
-			ifndef VERBOSA
-				ifndef VERBOSO
-					ifndef VERBEUSE
-						ifndef VERBEUX
-							ifndef шумный
-								ifndef 吵雜
-									ifndef वाचाल
-										ifndef ᕗᕉᑉᕉᔅ
-											.SILENT:
-										endif
-									endif
-								endif
-							endif
-						endif
-					endif
-				endif
-			endif
-		endif
-	endif
-endif
-
-
-#
-# Configure debug mode
-#
-ifdef DEBUG
-	ifneq ("$(DEBUG)", "off")
-		MB_MAKE_CALL_DEBUG ?= $(DEBUG)
-	endif
-endif
-ifdef ONTBEESTEN
-	ifneq ("$(ONTBEESTEN)", "uit")
-		MB_MAKE_CALL_DEBUG ?= $(ONTBEESTEN)
-	endif
-endif
-ifdef デバッグ
-	ifneq ("$(デバッグ)", "ユニット")
-		MB_MAKE_CALL_DEBUG ?= $(デバッグ)
-	endif
-endif
-ifdef DEPURAR
-	ifneq ("$(DEPURAR)", "traje")
-		MB_MAKE_CALL_DEBUG ?= $(DEPURAR)
-	endif
-endif
-ifdef DÉBOGUER
-	ifneq ("$(DÉBOGUER)", "dehors")
-		MB_MAKE_CALL_DEBUG ?= $(DÉBOGUER)
-	endif
-endif
-ifdef отлаживать
-	ifneq ("$(отлаживать)", "вне")
-		MB_MAKE_CALL_DEBUG ?= $(отлаживать)
-	endif
-endif
-ifdef 偵錯
-	ifneq ("$(偵錯)", "出去")
-		MB_MAKE_CALL_DEBUG ?= $(偵錯)
-	endif
-endif
-ifdef डिबग
-	ifneq ("$(डिबग)", "बंद")
-		MB_MAKE_CALL_DEBUG ?= $(डिबग)
-	endif
-endif
-ifdef ᐃᕿᒡᒐᖅᑐᖅ
-	ifneq ("$(ᐃᕿᒡᒐᖅᑐᖅ)", "ᖃᒥᓪᓗᒍ")
-		MB_MAKE_CALL_DEBUG ?= $(ᐃᕿᒡᒐᖅᑐᖅ)
-	endif
-endif
-
diff --git a/lib/msxbuild.mk b/lib/msxbuild.mk
index c688c0c..c580a1b 100644
--- a/lib/msxbuild.mk
+++ b/lib/msxbuild.mk
@@ -1,6 +1,21 @@
 #
 # msxbuild.mk - Makefile helper to use with msx projects.
 #
+# Make make, make behave;
+MAKEFLAGS += --no-builtin-rules
+MAKEFLAGS += --no-builtin-variables
+MAKEFLAGS += --warn-undefined-variables
+.DELETE_ON_ERROR :=
+.RECIPEPREFIX := $(if $(.RECIPEPREFIX),$(.RECIPEPREFIX),>)
+.SUFFIXES :=
+.ONESHELL :=
+.SHELLFLAGS := -e -u -o pipefail -c
+SHELL := bash
+ifeq ($(origin .RECIPEPREFIX), undefined)
+	$(error This version of make does not support dynamic white space brain fuck mode.)
+endif
+
+# Set some root variable to use in this library
 MB_@RECIPE := ]
 MB_@RECIPEPREFIX := $(.RECIPEPREFIX)
 MB_@BASEPATH := $(dir $(lastword $(MAKEFILE_LIST)))
@@ -46,6 +61,7 @@ $(eval $(call __mb_include,make/𓃬　𓍄　𓋹𓀭/mb_flow_sdcc.mk))
 $(eval $(call __mb_include,make/𓃬　𓍄　𓋹𓀭/mb_flow_clone.mk))
 @@include-libs:: $(MB_@INCLUDE_CHAIN)
 MB_@INCLUDE_CHAIN :=
+$(eval $(call __mb_include,make/mb_env.mk))
 $(eval $(call __mb_include,make/mb_flight.mk))
 $(eval $(call __mb_include,make/i18n/mb_i18n.mk))
 ifneq ("$(MB_I18N)", "off")