diff --git a/Makefile b/Makefile
index 7063ab59ac45..979ed7ba3926 100644
--- a/Makefile
+++ b/Makefile
@@ -353,7 +353,7 @@ install:
 	  VERSION \
 	  "$(INSTALL_LIBDIR)"
 	$(MAKE) -C runtime install
-	$(INSTALL_PROG) ocaml$(EXE) "$(INSTALL_BINDIR)/ocaml$(EXE)"
+	$(INSTALL_PROG) ocaml$(EXE) "$(INSTALL_BINDIR)"
 ifeq "$(INSTALL_BYTECODE_PROGRAMS)" "true"
 	$(INSTALL_PROG) ocamlc$(EXE) "$(INSTALL_BINDIR)/ocamlc.byte$(EXE)"
 endif
@@ -362,7 +362,7 @@ ifeq "$(INSTALL_BYTECODE_PROGRAMS)" "true"
 	$(INSTALL_PROG) lex/ocamllex$(EXE) \
 	  "$(INSTALL_BINDIR)/ocamllex.byte$(EXE)"
 endif
-	$(INSTALL_PROG) yacc/ocamlyacc$(EXE) "$(INSTALL_BINDIR)/ocamlyacc$(EXE)"
+	$(INSTALL_PROG) yacc/ocamlyacc$(EXE) "$(INSTALL_BINDIR)"
 	$(INSTALL_DATA) \
 	   utils/*.cmi \
 	   parsing/*.cmi \
@@ -391,7 +391,7 @@ endif
 	$(INSTALL_DATA) \
 	   $(BYTESTART) $(TOPLEVELSTART) \
 	   "$(INSTALL_COMPLIBDIR)"
-	$(INSTALL_PROG) $(expunge) "$(INSTALL_LIBDIR)/$(expunge)"
+	$(INSTALL_PROG) $(expunge) "$(INSTALL_LIBDIR)"
 	$(INSTALL_DATA) \
 	   toplevel/topdirs.cmi \
 	   "$(INSTALL_LIBDIR)"
@@ -420,7 +420,7 @@ ifeq "$(UNIX_OR_WIN32)" "win32"
 	  $(MAKE) install-flexdll; \
 	fi
 endif
-	$(INSTALL_DATA) Makefile.config "$(INSTALL_LIBDIR)/Makefile.config"
+	$(INSTALL_DATA) Makefile.config "$(INSTALL_LIBDIR)"
 ifeq "$(INSTALL_BYTECODE_PROGRAMS)" "true"
 	if test -f ocamlopt$(EXE); then $(MAKE) installopt; else \
 	   cd "$(INSTALL_BINDIR)"; \
@@ -511,11 +511,9 @@ endif
 
 .PHONY: installoptopt
 installoptopt:
-	$(INSTALL_PROG) ocamlc.opt$(EXE) "$(INSTALL_BINDIR)/ocamlc.opt$(EXE)"
-	$(INSTALL_PROG) ocamlopt.opt$(EXE) \
-	  "$(INSTALL_BINDIR)/ocamlopt.opt$(EXE)"
-	$(INSTALL_PROG) \
-	  lex/ocamllex.opt$(EXE) "$(INSTALL_BINDIR)/ocamllex.opt$(EXE)"
+	$(INSTALL_PROG) ocamlc.opt$(EXE) "$(INSTALL_BINDIR)"
+	$(INSTALL_PROG) ocamlopt.opt$(EXE) "$(INSTALL_BINDIR)"
+	$(INSTALL_PROG) lex/ocamllex.opt$(EXE) "$(INSTALL_BINDIR)"
 	cd "$(INSTALL_BINDIR)"; \
 	   $(LN) ocamlc.opt$(EXE) ocamlc$(EXE); \
 	   $(LN) ocamlopt.opt$(EXE) ocamlopt$(EXE); \
@@ -538,8 +536,7 @@ installoptopt:
 	   $(OPTSTART:.cmo=.cmx) $(OPTSTART:.cmo=.$(O)) \
 	   "$(INSTALL_COMPLIBDIR)"
 	if test -f ocamlnat$(EXE) ; then \
-	  $(INSTALL_PROG) \
-	    ocamlnat$(EXE) "$(INSTALL_BINDIR)/ocamlnat$(EXE)"; \
+	  $(INSTALL_PROG) ocamlnat$(EXE) "$(INSTALL_BINDIR)"; \
 	  $(INSTALL_DATA) \
 	     toplevel/opttopdirs.cmi \
 	     "$(INSTALL_LIBDIR)"; \
diff --git a/debugger/Makefile b/debugger/Makefile
index 73d050e7ee30..1f94e74af6de 100644
--- a/debugger/Makefile
+++ b/debugger/Makefile
@@ -60,7 +60,7 @@ ocamldebug$(EXE): $(libraries) $(all_objects)
 	$(CAMLC) $(LINKFLAGS) -o $@ -linkall $^
 
 install:
-	$(INSTALL_PROG) ocamldebug$(EXE) "$(INSTALL_BINDIR)/ocamldebug$(EXE)"
+	$(INSTALL_PROG) ocamldebug$(EXE) "$(INSTALL_BINDIR)"
 
 clean::
 	rm -f ocamldebug ocamldebug.exe
diff --git a/ocamldoc/Makefile b/ocamldoc/Makefile
index 2f2704c56131..39b00d174449 100644
--- a/ocamldoc/Makefile
+++ b/ocamldoc/Makefile
@@ -294,7 +294,7 @@ install:
 	$(MKDIR) "$(INSTALL_BINDIR)"
 	$(MKDIR) "$(INSTALL_LIBDIR)/ocamldoc"
 	$(MKDIR) "$(INSTALL_MANODIR)"
-	$(INSTALL_PROG) $(OCAMLDOC) "$(INSTALL_BINDIR)/$(OCAMLDOC)"
+	$(INSTALL_PROG) $(OCAMLDOC) "$(INSTALL_BINDIR)"
 	$(INSTALL_DATA) \
 	  ocamldoc.hva *.cmi $(OCAMLDOC_LIBCMA) \
 	  "$(INSTALL_LIBDIR)/ocamldoc"
@@ -321,8 +321,7 @@ installopt:
 installopt_really:
 	$(MKDIR) "$(INSTALL_BINDIR)"
 	$(MKDIR) "$(INSTALL_LIBDIR)/ocamldoc"
-	$(INSTALL_PROG) \
-	   $(OCAMLDOC_OPT) "$(INSTALL_BINDIR)/$(OCAMLDOC_OPT)"
+	$(INSTALL_PROG) $(OCAMLDOC_OPT) "$(INSTALL_BINDIR)"
 	$(INSTALL_DATA) \
 	  $(OCAMLDOC_LIBCMIS) \
 	  "$(INSTALL_LIBDIR)/ocamldoc"
diff --git a/otherlibs/Makefile.otherlibs.common b/otherlibs/Makefile.otherlibs.common
index e18ee72c6ac5..1d43b1315d11 100644
--- a/otherlibs/Makefile.otherlibs.common
+++ b/otherlibs/Makefile.otherlibs.common
@@ -86,8 +86,7 @@ lib$(CLIBNAME).$(A): $(COBJS)
 install::
 	if test -f dll$(CLIBNAME)$(EXT_DLL); then \
 	  $(INSTALL_PROG) \
-	    dll$(CLIBNAME)$(EXT_DLL) \
-	    "$(INSTALL_STUBLIBDIR)/"; \
+	    dll$(CLIBNAME)$(EXT_DLL) "$(INSTALL_STUBLIBDIR)"; \
 	fi
 ifneq "$(STUBSLIB)" ""
 	$(INSTALL_DATA) $(STUBSLIB) "$(INSTALL_LIBDIR)/"
@@ -113,7 +112,7 @@ installopt:
 	   "$(INSTALL_LIBDIR)/"
 	cd "$(INSTALL_LIBDIR)"; $(RANLIB) $(LIBNAME).a
 	if test -f $(LIBNAME).cmxs; then \
-	  $(INSTALL_PROG) $(LIBNAME).cmxs "$(INSTALL_LIBDIR)/"; \
+	  $(INSTALL_PROG) $(LIBNAME).cmxs "$(INSTALL_LIBDIR)"; \
 	fi
 
 partialclean:
diff --git a/otherlibs/dynlink/Makefile b/otherlibs/dynlink/Makefile
index b1e419840112..24b5611552af 100644
--- a/otherlibs/dynlink/Makefile
+++ b/otherlibs/dynlink/Makefile
@@ -241,8 +241,7 @@ ifeq "$(INSTALL_SOURCE_ARTIFACTS)" "true"
 	  dynlink.cmti dynlink.mli \
 	  "$(INSTALL_LIBDIR)"
 endif
-	$(INSTALL_PROG) \
-	  $(extract_crc) "$(INSTALL_LIBDIR)/$(extract_crc)"
+	$(INSTALL_PROG) $(extract_crc) "$(INSTALL_LIBDIR)"
 
 installopt:
 	if $(NATDYNLINK); then \
diff --git a/otherlibs/systhreads/Makefile b/otherlibs/systhreads/Makefile
index b918fd0b33ec..7852bc89bbcd 100644
--- a/otherlibs/systhreads/Makefile
+++ b/otherlibs/systhreads/Makefile
@@ -109,8 +109,7 @@ INSTALL_THREADSLIBDIR=$(INSTALL_LIBDIR)/$(LIBNAME)
 
 install:
 	if test -f dllthreads$(EXT_DLL); then \
-	  $(INSTALL_PROG) \
-	    dllthreads$(EXT_DLL) "$(INSTALL_STUBLIBDIR)/dllthreads$(EXT_DLL)"; \
+	  $(INSTALL_PROG) dllthreads$(EXT_DLL) "$(INSTALL_STUBLIBDIR)"; \
 	fi
 	$(INSTALL_DATA) libthreads.$(A) "$(INSTALL_LIBDIR)"
 	cd "$(INSTALL_LIBDIR)"; $(RANLIB) libthreads.$(A)
diff --git a/tools/Makefile b/tools/Makefile
index fa5fcb1e5358..01ee67855a41 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -188,19 +188,18 @@ ifeq "$(INSTALL_BYTECODE_PROGRAMS)" "true"
 	do \
 	  $(INSTALL_PROG) "$$i$(EXE)" "$(INSTALL_BINDIR)/$$i.byte$(EXE)"; \
 	  if test -f "$$i".opt$(EXE); then \
-	    $(INSTALL_PROG) "$$i.opt$(EXE)" \
-	      "$(INSTALL_BINDIR)/$$i.opt$(EXE)" && \
-	    (cd "$(INSTALL_BINDIR)/" && $(LN) "$$i.opt$(EXE)" "$$i$(EXE)"); \
+	    $(INSTALL_PROG) "$$i.opt$(EXE)" "$(INSTALL_BINDIR)" && \
+	    (cd "$(INSTALL_BINDIR)" && $(LN) "$$i.opt$(EXE)" "$$i$(EXE)"); \
 	  else \
-	    (cd "$(INSTALL_BINDIR)/" && $(LN) "$$i.byte$(EXE)" "$$i$(EXE)"); \
+	    (cd "$(INSTALL_BINDIR)" && $(LN) "$$i.byte$(EXE)" "$$i$(EXE)"); \
 	  fi; \
 	done
 else
 	for i in $(install_files); \
 	do \
 	  if test -f "$$i".opt$(EXE); then \
-	    $(INSTALL_PROG) "$$i.opt$(EXE)" "$(INSTALL_BINDIR)/$$i.opt$(EXE)"; \
-	    (cd "$(INSTALL_BINDIR)/" && $(LN) "$$i.opt$(EXE)" "$$i$(EXE)"); \
+	    $(INSTALL_PROG) "$$i.opt$(EXE)" "$(INSTALL_BINDIR)"; \
+	    (cd "$(INSTALL_BINDIR)" && $(LN) "$$i.opt$(EXE)" "$$i$(EXE)"); \
 	  fi; \
 	done
 endif
@@ -244,10 +243,9 @@ install::
 	  $(INSTALL_PROG)\
 	    ocamlcmt.opt$(EXE) "$(INSTALL_BINDIR)/ocamlcmt$(EXE)"; \
 	else \
-	  $(INSTALL_PROG) ocamlcmt$(EXE) "$(INSTALL_BINDIR)/ocamlcmt$(EXE)"; \
+	  $(INSTALL_PROG) ocamlcmt$(EXE) "$(INSTALL_BINDIR)"; \
 	fi
 
-
 # The bytecode disassembler
 
 DUMPOBJ= \
@@ -301,8 +299,7 @@ OBJINFO=$(ROOTDIR)/compilerlibs/ocamlcommon.cma \
 $(call byte_and_opt,ocamlobjinfo,$(OBJINFO),objinfo_helper$(EXE))
 
 install::
-	$(INSTALL_PROG) \
-	  objinfo_helper$(EXE) "$(INSTALL_LIBDIR)/objinfo_helper$(EXE)"
+	$(INSTALL_PROG) objinfo_helper$(EXE) "$(INSTALL_LIBDIR)"
 
 primreq=$(ROOTDIR)/compilerlibs/ocamlcommon.cma \
         $(ROOTDIR)/compilerlibs/ocamlbytecomp.cma \