diff --git a/mk/spksrc.service.installer.dsm6 b/mk/spksrc.service.installer.dsm6
index 8a7361d6b041..853c49f442d4 100644
--- a/mk/spksrc.service.installer.dsm6
+++ b/mk/spksrc.service.installer.dsm6
@@ -370,3 +370,19 @@ postupgrade ()
 
     exit 0
 }
+
+prereplace ()
+{
+    log_step "prereplace"
+    call_func "validate_prereplace"
+    call_func "service_prereplace" install_log
+    exit 0
+}
+
+postreplace ()
+{
+    log_step "postreplace"
+    call_func "validate_postreplace"
+    call_func "service_postreplace" install_log
+    exit 0
+}
diff --git a/mk/spksrc.service.installer.dsm7 b/mk/spksrc.service.installer.dsm7
index 8c17435126a9..0f557dedc3f1 100644
--- a/mk/spksrc.service.installer.dsm7
+++ b/mk/spksrc.service.installer.dsm7
@@ -242,3 +242,19 @@ postupgrade ()
 
     exit 0
 }
+
+prereplace ()
+{
+    log_step "prereplace"
+    call_func "validate_prereplace"
+    call_func "service_prereplace" install_log
+    exit 0
+}
+
+postreplace ()
+{
+    log_step "postreplace"
+    call_func "validate_postreplace"
+    call_func "service_postreplace" install_log
+    exit 0
+}
diff --git a/mk/spksrc.service.privilege-installasroot b/mk/spksrc.service.privilege-installasroot
index 02d5d7e927f4..e41bd6b3ec4b 100644
--- a/mk/spksrc.service.privilege-installasroot
+++ b/mk/spksrc.service.privilege-installasroot
@@ -21,5 +21,11 @@
     }, {
         "action": "postupgrade",
         "run-as": "root"
+    }, {
+        "action": "prereplace",
+        "run-as": "root"
+    }, {
+        "action": "postreplace",
+        "run-as": "root"
     }]
 }
diff --git a/mk/spksrc.service.privilege-startasroot b/mk/spksrc.service.privilege-startasroot
index ec7285735be1..fed43240ba15 100644
--- a/mk/spksrc.service.privilege-startasroot
+++ b/mk/spksrc.service.privilege-startasroot
@@ -21,6 +21,12 @@
 	}, {
 		"action": "postupgrade",
 		"run-as": "root"
+	}, {
+		"action": "prereplace",
+		"run-as": "root"
+	}, {
+		"action": "postreplace",
+		"run-as": "root"
 	}, {
 		"action": "start",
 		"run-as": "root"
diff --git a/mk/spksrc.spk.mk b/mk/spksrc.spk.mk
index 4044e559a8cd..7d6aa7593c3d 100644
--- a/mk/spksrc.spk.mk
+++ b/mk/spksrc.spk.mk
@@ -113,6 +113,7 @@ DSM_SCRIPTS_DIR = $(WORK_DIR)/scripts
 DSM_SCRIPT_FILES  = preinst postinst
 DSM_SCRIPT_FILES += preuninst postuninst
 DSM_SCRIPT_FILES += preupgrade postupgrade
+DSM_SCRIPT_FILES += prereplace postreplace
 
 # SPK specific scripts
 ifneq ($(strip $(SSS_SCRIPT)),)
@@ -211,6 +212,12 @@ endif
 ifneq ($(strip $(INSTUNINST_RESTART_SERVICES)),)
 	@echo instuninst_restart_services=\"$(INSTUNINST_RESTART_SERVICES)\" >> $@
 endif
+ifneq ($(strip $(INSTALL_REPLACE_PACKAGES)),)
+	@echo install_replace_packages=\"$(INSTALL_REPLACE_PACKAGES)\" >> $@
+endif
+ifneq ($(strip $(CHECKPORT)),)
+	@echo checkport=\"$(CHECKPORT)\" >> $@
+endif
 
 # for non startable (i.e. non service, cli tools only)
 # as default is 'yes' we only add this value for 'no'
@@ -333,6 +340,10 @@ $(DSM_SCRIPTS_DIR)/preupgrade:
 	@$(dsm_script_redirect)
 $(DSM_SCRIPTS_DIR)/postupgrade:
 	@$(dsm_script_redirect)
+$(DSM_SCRIPTS_DIR)/prereplace:
+	@$(dsm_script_redirect)
+$(DSM_SCRIPTS_DIR)/postreplace:
+	@$(dsm_script_redirect)
 
 # Package Icons
 .PHONY: icons