diff --git a/mk/build.mk b/mk/build.mk
index 937affda..74c331c6 100644
--- a/mk/build.mk
+++ b/mk/build.mk
@@ -3,10 +3,10 @@ include mk/objects.mk
 include mk/generatedcode.mk
 
 $(BINDIR)/bpp: $(BPP_OBJS) $(FLEXBISON_GENERATED_OBJS) $(MAIN_OBJ)
-	$(CXX) $(CXXFLAGS) $(INCLUDEFLAGS) -o $@ $^
+	$(CXX) $(CXXFLAGS) $(CPPFLAGS) -o $@ $^
 
 $(BINDIR)/bpp-lsp: $(LSP_MAIN_OBJ) $(BPP_OBJS) $(FLEXBISON_GENERATED_OBJS) $(LSP_OBJS)
-	$(CXX) $(CXXFLAGS) $(INCLUDEFLAGS) -o $@ $^
+	$(CXX) $(CXXFLAGS) $(CPPFLAGS) -o $@ $^
 
 clean-bin:
 	@rm -f $(BINDIR)/bpp $(BINDIR)/bpp-lsp
diff --git a/mk/config.mk b/mk/config.mk
index 1070d373..f73b4bd4 100644
--- a/mk/config.mk
+++ b/mk/config.mk
@@ -1,7 +1,11 @@
 # C++ CONFIG
-CXX          := g++
-CXXFLAGS     := -std=gnu++23 -O2 -s -Wall -MMD -MP
-INCLUDEFLAGS := -Isrc/
+CXX      ?= g++
+CXXFLAGS ?= -O2 -s
+# С++ required flags
+CXXFLAGS += -std=gnu++23 -Wall -MMD -MP
+# standard preprocessor and linker variables
+CPPFLAGS ?=
+CPPFLAGS += -Isrc/
 
 # Can we parse debian/changelog?
 PARSECHANGELOG := $(shell command -v dpkg-parsechangelog 2>/dev/null)
diff --git a/mk/generatedcode.mk b/mk/generatedcode.mk
index 0605a7eb..96788208 100644
--- a/mk/generatedcode.mk
+++ b/mk/generatedcode.mk
@@ -20,7 +20,7 @@ $(FLEXBISON_GENERATED_STAMP): $(FLEXBISONDIR)/lexer.l $(FLEXBISONDIR)/parser.y
 
 # LSP CLASSES GENERATION
 $(LSP_OBJDIR)/generateLSPClasses: $(LSP_GENERATOR_OBJS)
-	$(CXX) $(CXXFLAGS) $(INCLUDEFLAGS) -o $@ $^
+	$(CXX) $(CXXFLAGS) $(CPPFLAGS) -o $@ $^
 
 $(LSP_GENERATED_STAMP): $(LSP_OBJDIR)/generateLSPClasses
 	@mkdir -p $(LSP_GENERATEDDIR)
diff --git a/mk/objects.mk b/mk/objects.mk
index d5b51588..dda66e22 100644
--- a/mk/objects.mk
+++ b/mk/objects.mk
@@ -6,13 +6,13 @@
 
 $(OBJDIR)/%.o: $(SRCDIR)/%.cpp
 	@mkdir -p $(dir $@)
-	$(CXX) $(CXXFLAGS) $(INCLUDEFLAGS) -c $< -o $@
+	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $< -o $@
 
 # The LSP generator is not part of the compiler itself.
 # It's an intermediary tool that we use to generate classes for the LSP implementation
 $(OBJDIR)/lsp/generator/%.o: $(SRCDIR)/lsp/generator/%.cpp $(LSPDIR)/metaModel.json
 	@mkdir -p $(dir $@)
-	$(CXX) $(CXXFLAGS) -c $< -o $@
+	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $< -o $@
 
 # Generated-code prerequisites
 #