diff --git a/Makefile.in b/Makefile.in
index 6b10e46..6c0b64f 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -97,16 +97,16 @@ install:	install-libs install-headers
 install-libs:	install-shared install-static install-implib
 
 install-headers:shared static
-		mkdir -p $(DESTDIR)///./$(PREFIX)/./$(INCLUDEDIR)/$(PACKAGE)
-		cp $(API_HEADERS) $(DESTDIR)///./$(PREFIX)/./$(INCLUDEDIR)/$(PACKAGE)
+		mkdir -p $(DESTDIR)$(INCLUDEDIR)/$(PACKAGE)
+		cp $(API_HEADERS) $(DESTDIR)$(INCLUDEDIR)/$(PACKAGE)
 
 install-shared:	shared install-implib
-		mkdir -p $(DESTDIR)///./$(PREFIX)/./$(LIBDIR)
-		cp $(SHARED_LIB) $(DESTDIR)///./$(PREFIX)/./$(LIBDIR)
+		mkdir -p $(DESTDIR)$(LIBDIR)
+		cp $(SHARED_LIB) $(DESTDIR)$(LIBDIR)
 
 install-static:	static
-		mkdir -p $(DESTDIR)///./$(PREFIX)/./$(LIBDIR)
-		cp $(STATIC_LIB) $(DESTDIR)///./$(PREFIX)/./$(LIBDIR)
+		mkdir -p $(DESTDIR)$(LIBDIR)
+		cp $(STATIC_LIB) $(DESTDIR)$(LIBDIR)
 
 
 
diff --git a/sysinfo/os/midipix.mk b/sysinfo/os/midipix.mk
index 68766d1..4b5a608 100644
--- a/sysinfo/os/midipix.mk
+++ b/sysinfo/os/midipix.mk
@@ -8,5 +8,5 @@ OS_LIBDEF_EXT 	= .so.def
 OS_ARCHIVE_EXT 	= .a
 
 install-implib: shared-implib
-		mkdir -p $(DESTDIR)///./$(PREFIX)/./$(LIBDIR)
-		cp $(SHARED_IMPLIB) $(DESTDIR)///./$(PREFIX)/./$(LIBDIR)
+		mkdir -p $(DESTDIR)$(LIBDIR)
+		cp $(SHARED_IMPLIB) $(DESTDIR)$(LIBDIR)
diff --git a/sysinfo/os/mingw.mk b/sysinfo/os/mingw.mk
index 1a66aba..085d1be 100644
--- a/sysinfo/os/mingw.mk
+++ b/sysinfo/os/mingw.mk
@@ -10,5 +10,5 @@ OS_ARCHIVE_EXT 	= .a
 CFLAGS_PIC 	=
 
 install-implib:	shared-implib
-		mkdir -p $(DESTDIR)///./$(PREFIX)/./$(LIBDIR)
-		cp $(SHARED_IMPLIB) $(DESTDIR)///./$(PREFIX)/./$(LIBDIR)
+		mkdir -p $(DESTDIR)$(LIBDIR)
+		cp $(SHARED_IMPLIB) $(DESTDIR)$(LIBDIR)