diff --git a/client/Makefile b/client/Makefile
index 87564f960..014211325 100644
--- a/client/Makefile
+++ b/client/Makefile
@@ -890,11 +890,11 @@ ifneq (,$(INSTALLSHARE))
 	    $(Q)$(INSTALLSUDO) $(MKDIR) $(DESTDIR)$(PREFIX)$(PATHSEP)$(INSTALLSHARERELPATH)
 	    # hack ahead: inject installation path into pm3_resources.py
     ifeq ($(platform),Darwin)
-	    $(Q)sed -i '' 's|^TOOLS_PATH \?= \?None|TOOLS_PATH="$(PREFIX)$(PATHSEP)$(INSTALLTOOLSRELPATH)"|' pyscripts/pm3_resources.py
-	    $(Q)sed -i '' 's|^DICTS_PATH \?= \?None|DICTS_PATH="$(PREFIX)$(PATHSEP)$(INSTALLSHARERELPATH)/dictionaries"|' pyscripts/pm3_resources.py
+	    $(Q)sed -E -i '' 's|^TOOLS_PATH \?= \?None|TOOLS_PATH="$(PREFIX)$(PATHSEP)$(INSTALLTOOLSRELPATH)"|' pyscripts/pm3_resources.py
+	    $(Q)sed -E -i '' 's|^DICTS_PATH \?= \?None|DICTS_PATH="$(PREFIX)$(PATHSEP)$(INSTALLSHARERELPATH)/dictionaries"|' pyscripts/pm3_resources.py
 	    $(Q)$(INSTALLSUDO) $(CP) $(INSTALLSHARE) $(DESTDIR)$(PREFIX)$(PATHSEP)$(INSTALLSHARERELPATH)
-	    $(Q)sed -i '' 's|^TOOLS_PATH \?=.*|TOOLS_PATH = None|' pyscripts/pm3_resources.py
-	    $(Q)sed -i '' 's|^DICTS_PATH \?=.*|DICTS_PATH = None|' pyscripts/pm3_resources.py
+	    $(Q)sed -E -i '' 's|^TOOLS_PATH \?=.*|TOOLS_PATH = None|' pyscripts/pm3_resources.py
+	    $(Q)sed -E -i '' 's|^DICTS_PATH \?=.*|DICTS_PATH = None|' pyscripts/pm3_resources.py
     else
 	    $(Q)sed -i 's|^TOOLS_PATH \?= \?None|TOOLS_PATH="$(PREFIX)$(PATHSEP)$(INSTALLTOOLSRELPATH)"|' pyscripts/pm3_resources.py
 	    $(Q)sed -i 's|^DICTS_PATH \?= \?None|DICTS_PATH="$(PREFIX)$(PATHSEP)$(INSTALLSHARERELPATH)/dictionaries"|' pyscripts/pm3_resources.py