diff --git a/Makefile.bsd b/Makefile.bsd
index bd387a7..2749aec 100644
--- a/Makefile.bsd
+++ b/Makefile.bsd
@@ -56,7 +56,7 @@ endif
 LINKER_LINK_SHARED_LIBRARY_OPTIONS = -shared
 LINKER_LINK_SHARED_DLOADABLE_OPTIONS = -shared -Wl,-R"$(RUNTIME_LINKER_PATH)" -Wl,-L.
 LINKER_LINK_SHARED_PROGRAM_OPTIONS = -Wl,-R"$(RUNTIME_LINKER_PATH)"
-LIBCHICKEN_SO_LINKER_OPTIONS = -Wl,-soname,lib$(PROGRAM_PREFIX)chicken$(PROGRAM_SUFFIX).so$(SONAME_VERSION)
+LIBCHICKEN_SO_LINKER_OPTIONS = -Wl,-soname,lib$(PROGRAM_PREFIX)chicken$(PROGRAM_SUFFIX).so.$(BINARYVERSION)
 LIBRARIES = -lm -lpthread
 NEEDS_RELINKING = yes
 USES_SONAME = yes
diff --git a/Makefile.haiku b/Makefile.haiku
index fe7fce9..c6e33ab 100644
--- a/Makefile.haiku
+++ b/Makefile.haiku
@@ -49,7 +49,7 @@ endif
 LINKER_LINK_SHARED_LIBRARY_OPTIONS = -shared
 LINKER_LINK_SHARED_DLOADABLE_OPTIONS = -L. -shared -Wl,-R$(RUNTIME_LINKER_PATH)
 LINKER_LINK_SHARED_PROGRAM_OPTIONS = -Wl,-R$(RUNTIME_LINKER_PATH)
-LIBCHICKEN_SO_LINKER_OPTIONS = -Wl,-soname,lib$(PROGRAM_PREFIX)chicken$(PROGRAM_SUFFIX).so$(SONAME_VERSION)
+LIBCHICKEN_SO_LINKER_OPTIONS = -Wl,-soname,lib$(PROGRAM_PREFIX)chicken$(PROGRAM_SUFFIX).so.$(BINARYVERSION)
 LIBRARIES = -lnetwork
 NEEDS_RELINKING = yes
 USES_SONAME = yes
diff --git a/Makefile.linux b/Makefile.linux
index 68646cf..11d3b9f 100644
--- a/Makefile.linux
+++ b/Makefile.linux
@@ -50,7 +50,7 @@ endif
 LINKER_LINK_SHARED_LIBRARY_OPTIONS = -shared
 LINKER_LINK_SHARED_DLOADABLE_OPTIONS = -L. -shared -Wl,-R"$(RUNTIME_LINKER_PATH)"
 LINKER_LINK_SHARED_PROGRAM_OPTIONS = -Wl,-R"$(RUNTIME_LINKER_PATH)"
-LIBCHICKEN_SO_LINKER_OPTIONS = -Wl,-soname,lib$(PROGRAM_PREFIX)chicken$(PROGRAM_SUFFIX).so$(SONAME_VERSION)
+LIBCHICKEN_SO_LINKER_OPTIONS = -Wl,-soname,lib$(PROGRAM_PREFIX)chicken$(PROGRAM_SUFFIX).so.$(BINARYVERSION)
 LIBRARIES = -lm -ldl
 NEEDS_RELINKING = yes
 USES_SONAME = yes
diff --git a/rules.make b/rules.make
index db36969..f471a78 100644
--- a/rules.make
+++ b/rules.make
@@ -306,7 +306,7 @@ ifdef DLLSINPATH
 	$(MAKEDIR_COMMAND) $(MAKEDIR_COMMAND_OPTIONS) "$(DESTDIR)$(IBINDIR)"
 	$(INSTALL_PROGRAM) $(INSTALL_PROGRAM_SHARED_LIBRARY_OPTIONS) $(LIBCHICKEN_SO_FILE) "$(DESTDIR)$(IBINDIR)"
 else
-	$(INSTALL_PROGRAM) $(INSTALL_PROGRAM_SHARED_LIBRARY_OPTIONS) $(LIBCHICKEN_SO_FILE) "$(DESTDIR)$(ILIBDIR)$(SEP)$(LIBCHICKEN_SO_FILE)$(SONAME_VERSION)"
+	$(INSTALL_PROGRAM) $(INSTALL_PROGRAM_SHARED_LIBRARY_OPTIONS) $(LIBCHICKEN_SO_FILE) "$(DESTDIR)$(ILIBDIR)$(SEP)$(LIBCHICKEN_SO_FILE).$(BINARYVERSION)"
 endif
 ifdef USES_SONAME
 	cd "$(DESTDIR)$(ILIBDIR)" && ln -sf $(LIBCHICKEN_SO_FILE).$(BINARYVERSION) lib$(PROGRAM_PREFIX)chicken$(PROGRAM_SUFFIX)$(SO)
@@ -348,7 +348,7 @@ install-bin:
 	$(REMOVE_COMMAND) $(REMOVE_COMMAND_OPTIONS) $(IMPORT_LIBRARIES:%=%.so)
 	$(REMOVE_COMMAND) $(REMOVE_COMMAND_OPTIONS) $(IMPORT_LIBRARIES:%=%.import.so)
 	$(REMOVE_COMMAND) $(REMOVE_COMMAND_OPTIONS) $(LIBCHICKEN_SO_FILE)
-	$(MAKE) -f $(SRCDIR)Makefile.$(PLATFORM) CONFIG=$(CONFIG) NEEDS_RELINKING=no RUNTIME_LINKER_PATH="$(LIBDIR)" SONAME_VERSION=.$(BINARYVERSION) install-bin
+	$(MAKE) -f $(SRCDIR)Makefile.$(PLATFORM) CONFIG=$(CONFIG) NEEDS_RELINKING=no RUNTIME_LINKER_PATH="$(LIBDIR)" install-bin
 # Damn. What was this for, again?
 #
 # 	$(MAKE_WRITABLE_COMMAND) $(CHICKEN_PROGRAM)$(EXE) $(CSI_PROGRAM)$(EXE) $(CSC_PROGRAM)$(EXE) $(CHICKEN_PROFILE_PROGRAM)$(EXE)
-- 
1.7.10.4