diff -Naur a/lexilla/src/makefile b/lexilla/src/makefile
--- a/lexilla/src/makefile	2025-02-05 13:44:27.807344949 -0500
+++ b/lexilla/src/makefile	2025-02-05 14:09:19.668976650 -0500
@@ -15,7 +15,7 @@
 .SUFFIXES: .cxx
 
 DIR_O=.
-DIR_BIN=../bin
+DIR_BIN=$(DIR_O)/../bin
 
 WARNINGS = -Wpedantic -Wall -Wextra
 
@@ -73,15 +73,15 @@
 
 RANLIB ?= ranlib
 
-SCINTILLA_INCLUDE = ../../scintilla/include
+SCINTILLA_INCLUDE = $(DIR_O)/../../scintilla/include
 
-vpath %.h ../include ../../scintilla/include ../lexlib
-vpath %.cxx ../src ../lexlib ../lexers
+vpath %.h $(DIR_O)/../include $(DIR_O)/../../scintilla/include $(DIR_O)/../lexlib
+vpath %.cxx $(DIR_O)/../src $(DIR_O)/../lexlib $(DIR_O)/../lexers
 
 DEFINES += -D$(if $(DEBUG),DEBUG,NDEBUG)
 BASE_FLAGS += $(if $(DEBUG),-g,-O3)
 
-INCLUDES = -I ../include -I $(SCINTILLA_INCLUDE) -I ../lexlib
+INCLUDES = -I $(DIR_O)/../include -I $(SCINTILLA_INCLUDE) -I $(DIR_O)/../lexlib
 LDFLAGS += -shared
 
 BASE_FLAGS += $(WARNINGS)
@@ -98,15 +98,15 @@
 	$(WINDRES) $< $@
 
 analyze:
-	$(CXX) --analyze $(DEFINES) $(INCLUDES) $(BASE_FLAGS) $(CXXFLAGS) *.cxx ../lexlib/*.cxx ../lexers/*.cxx
+	$(CXX) --analyze $(DEFINES) $(INCLUDES) $(BASE_FLAGS) $(CXXFLAGS) *.cxx $(DIR_O)/../lexlib/*.cxx $(DIR_O)/../lexers/*.cxx
 
 depend deps.mak:
 	$(PYTHON) DepGen.py
 
 $(SCINTILLA_INCLUDE):
-	@echo Scintilla must be installed at ../../scintilla to provide access to Scintilla headers.
+	@echo Scintilla must be installed at $(DIR_O)/../../scintilla to provide access to Scintilla headers.
 
-LEXERS:=$(sort $(notdir $(wildcard ../lexers/Lex*.cxx)))
+LEXERS:=$(sort $(notdir $(wildcard $(DIR_O)/../lexers/Lex*.cxx)))
 
 OBJS = Lexilla.o
 
diff -Naur a/scite/gtk/makefile b/scite/gtk/makefile
--- a/scite/gtk/makefile	2025-02-05 13:44:27.844011165 -0500
+++ b/scite/gtk/makefile	2025-02-05 14:33:01.841495411 -0500
@@ -57,8 +57,8 @@
 # make should be run in ../../scintilla/gtk to compile all the lexers.
 SHAREDEXTENSION = $(if $(windir),dll,so)
 COMPLIB=$(SCINTILLA_DIR)/bin/scintilla.a
-COMPONENT=$(srcdir)/../bin/libscintilla.$(SHAREDEXTENSION)
-LEXILLA=$(srcdir)/../bin/liblexilla.$(SHAREDEXTENSION)
+COMPONENT=$(SCINTILLA_DIR)/bin/libscintilla.$(SHAREDEXTENSION)
+LEXILLA=$(LEXILLA_DIR)/bin/liblexilla.$(SHAREDEXTENSION)
 
 all: $(PROG) $(COMPONENT) $(LEXILLA)
 
@@ -116,10 +116,10 @@
 depend deps.mak:
 	$(PYTHON) AppDepGen.py
 
-../bin/%.$(SHAREDEXTENSION):	../../scintilla/bin/%.$(SHAREDEXTENSION)
+$(srcdir)/../bin/%.$(SHAREDEXTENSION):	$(SCINTILLA_DIR)/bin/%.$(SHAREDEXTENSION)
 	$(COPY) $< $(@D)
 
-../bin/%.$(SHAREDEXTENSION):	../../lexilla/bin/%.$(SHAREDEXTENSION)
+$(srcdir)/../bin/%.$(SHAREDEXTENSION):	$(LEXILLA_DIR)/bin/%.$(SHAREDEXTENSION)
 	$(COPY) $< $(@D)
 
 # To almost make lua.vers (needs header and footer added) which is only needed after updating Lua:
@@ -156,7 +156,7 @@
 	Utf8_16.o
 
 $(PROG): SciTEGTK.o Strips.o GUIGTK.o Widget.o DirectorExtension.o $(SRC_OBJS) $(LUA_OBJS)
-	$(CXX) $(BASE_FLAGS) $(LDFLAGS) -rdynamic -Wl,--as-needed -Wl,-rpath,'$${ORIGIN}' -Wl,--version-script $(srcdir)/lua.vers -Wl,-rpath,$(libdir) $^ -o $@ $(CONFIGLIB) $(LIBS) -L ../../scintilla/bin -lscintilla $(LDLIBS)
+	$(CXX) $(BASE_FLAGS) $(LDFLAGS) -rdynamic -Wl,--as-needed -Wl,-rpath,'$${ORIGIN}' -Wl,--version-script $(srcdir)/lua.vers -Wl,-rpath,$(libdir) $^ -o $@ $(CONFIGLIB) $(LIBS) -L $(SCINTILLA_DIR)/bin -lscintilla $(LDLIBS)
 
 # Automatically generate header dependencies with "make depend"
 include deps.mak