diff --git a/src/enzo/Make.config.assemble b/src/enzo/Make.config.assemble
index d7c520ffc..691e00ca8 100644
--- a/src/enzo/Make.config.assemble
+++ b/src/enzo/Make.config.assemble
@@ -563,20 +563,51 @@
 	$(error Illegal value '$(CONFIG_TPVEL)' for $$(CONFIG_TPVEL))
     endif
 
+#-----------------------------------------------------------------------
+# DETERMINE RADIATIVE TRANSFER SETTINGS
+#-----------------------------------------------------------------------
+
+    ERROR_PHOTON = 1
+
+    # Settings to turn radiative transfer ON
+
+    ifeq ($(CONFIG_PHOTON),yes)
+        ERROR_PHOTON = 0
+        ASSEMBLE_PHOTON_DEFINES = -DTRANSFER
+	OBJS_PHOTON_LIB = $(POBJS_CONFIG_LIB)
+    endif
+
+    # Settings to turn radiative transfer OFF
+
+    ifeq ($(CONFIG_PHOTON),no)
+        ERROR_PHOTON = 0
+        ASSEMBLE_PHOTON_DEFINES =
+	OBJS_PHOTON_LIB = 
+    endif
+
+    # error if CONFIG_PHOTON is incorrect
+
+    ifeq ($(ERROR_PHOTON),1)
+       .PHONY: error_transfer
+       error_tpvel:
+	$(error Illegal value '$(CONFIG_PHOTON)' for $$(CONFIG_PHOTON))
+    endif
+
+
 #-----------------------------------------------------------------------
 # DETERMINE FAST SIBLING SETTINGS
 #-----------------------------------------------------------------------
 
     ERROR_FAST_SIB = 1
 
-    # Settings to turn radiative transfer ON
+    # Settings to turn fast sibling search ON
 
     ifeq ($(CONFIG_FAST_SIB),yes)
         ERROR_FAST_SIB = 0
         ASSEMBLE_FAST_SIB_DEFINES = -DFAST_SIB
     endif
 
-    # Settings to turn radiative transfer OFF
+    # Settings to turn fast sibling search OFF
 
     ifeq ($(CONFIG_FAST_SIB),no)
         ERROR_FAST_SIB = 0
diff --git a/src/enzo/Make.config.targets b/src/enzo/Make.config.targets
index 6f1113e6d..51f80f096 100644
--- a/src/enzo/Make.config.targets
+++ b/src/enzo/Make.config.targets
@@ -138,11 +138,26 @@ help-config:
 	@echo "      gmake photon-yes"
 	@echo "      gmake photon-no"
 	@echo 
+	@echo "   Include fast sibling search"
+	@echo
+	@echo "      gmake fastsib-yes"
+	@echo "      gmake fastsib-no"
+	@echo 
+	@echo "   Include sibling subgrid boundary fix"
+	@echo
+	@echo "      gmake fluxfix-yes"
+	@echo "      gmake fluxfix-no"
+	@echo 
 	@echo "   Set whether to use HDF4"
 	@echo
 	@echo "      gmake use-hdf4-yes"
 	@echo "      gmake use-hdf4-no"
 	@echo
+	@echo "   Set whether to use inline python"
+	@echo
+	@echo "      gmake python-yes"
+	@echo "      gmake python-no"
+	@echo
 
 #-----------------------------------------------------------------------
 
@@ -198,6 +213,8 @@ show-config:
 	@echo "   CONFIG_TPVEL:                 $(CONFIG_TPVEL)"
 	@echo "   CONFIG_PHOTON:                $(CONFIG_PHOTON)"
 	@echo "   CONFIG_USE_HDF4:              $(CONFIG_USE_HDF4)"
+	@echo "   CONFIG_FAST_SIB:              $(CONFIG_FAST_SIB)"
+	@echo "   CONFIG_FLUX_FIX:              $(CONFIG_FLUX_FIX)"
 	@echo
 
 #-----------------------------------------------------------------------
@@ -589,6 +606,43 @@ CONFIG_PHOTON-%:
 	$(MAKE) show-config | grep CONFIG_PHOTON:
 	@echo
 
+#-----------------------------------------------------------------------
+
+VALID_FAST_SIB = fastsib-yes fastsib-no
+.PHONY: $(VALID_FAST_SIB)
+
+fastsib-yes: CONFIG_FAST_SIB-yes
+fastsib-no: CONFIG_FAST_SIB-no
+fastsib-%:
+	@printf "\n\tInvalid target: $@\n\n\tValid targets: [$(VALID_FAST_SIB)]\n\n"
+CONFIG_FAST_SIB-%: suggest-clean
+	@tmp=.config.temp; \
+        grep -v CONFIG_FAST_SIB $(MAKE_CONFIG_OVERRIDE) > $${tmp}; \
+        mv $${tmp} $(MAKE_CONFIG_OVERRIDE); \
+        echo "CONFIG_FAST_SIB = $*" >> $(MAKE_CONFIG_OVERRIDE); \
+	$(MAKE)  show-config | grep CONFIG_FAST_SIB:
+	@echo
+
+
+#-----------------------------------------------------------------------
+
+VALID_FLUX_FIX = fluxfix-yes fluxfix-no
+.PHONY: $(VALID_FLUX_FIX)
+
+fluxfix-yes: CONFIG_FLUX_FIX-yes
+fluxfix-no: CONFIG_FLUX_FIX-no
+fluxfix-%:
+	@printf "\n\tInvalid target: $@\n\n\tValid targets: [$(VALID_FLUX_FIX)]\n\n"
+CONFIG_FLUX_FIX-%: suggest-clean
+	@tmp=.config.temp; \
+        grep -v CONFIG_FLUX_FIX $(MAKE_CONFIG_OVERRIDE) > $${tmp}; \
+        mv $${tmp} $(MAKE_CONFIG_OVERRIDE); \
+        echo "CONFIG_FLUX_FIX = $*" >> $(MAKE_CONFIG_OVERRIDE); \
+	$(MAKE)  show-config | grep CONFIG_FLUX_FIX:
+	@echo
+
+
+#-----------------------------------------------------------------------
 
 VALID_USE-HDF4 = use-hdf4-yes use-hdf4-no
 .PHONY: $(VALID_USE-HDF4)
@@ -607,19 +661,3 @@ CONFIG_USE-HDF4-%: suggest-clean
 
 
 #-----------------------------------------------------------------------
-
-VALID_PHOTON = photon-yes photon-no
-.PHONY: $(VALID_PHOTON)
-
-photon-yes: CONFIG_PHOTON-yes
-photon-no: CONFIG_PHOTON-no
-photon-%:
-	@printf "\n\tInvalid target: $@\n\n\tValid targets: [$(VALID_PHOTON)]\n\n"
-CONFIG_PHOTON-%:
-	@tmp=.config.temp; \
-        grep -v CONFIG_PHOTON $(MAKE_CONFIG_OVERRIDE) > $${tmp}; \
-        mv $${tmp} $(MAKE_CONFIG_OVERRIDE); \
-        echo "CONFIG_PHOTON = $*" >> $(MAKE_CONFIG_OVERRIDE); \
-	$(MAKE) show-config | grep CONFIG_PHOTON:
-	@echo
-
diff --git a/src/enzo/Make.mach.darwin b/src/enzo/Make.mach.darwin
index cae78356a..a8bc0ca98 100644
--- a/src/enzo/Make.mach.darwin
+++ b/src/enzo/Make.mach.darwin
@@ -68,8 +68,7 @@ MACH_LD_NOMPI  = g++ # Linker when not using MPI
 # compile HDF5 with --with-default-api-version=v16, or Enzo with
 # -DH5_USE_16_API.
 
-MACH_DEFINES   = -DLINUX -DH5_USE_16_API -DFAST_SIB \
-	        -DSTATIC_SIBLING_LIST -DNO_FLUX_FIX -DNO_IO_LOG
+MACH_DEFINES   = -DLINUX -DH5_USE_16_API
 
 #-----------------------------------------------------------------------
 # Compiler flag settings
diff --git a/src/enzo/Options.C b/src/enzo/Options.C
index 4c908a54d..99978dfd8 100644
--- a/src/enzo/Options.C
+++ b/src/enzo/Options.C
@@ -169,6 +169,30 @@ int ENZO_OptionsinEffect(void)
     fprintf(opf, "  Adaptive ray tracing disabled\n");
 #endif
 
+#ifdef USE_PYTHON
+    fprintf(opf, "  Inline python enabled\n");
+#else
+    fprintf(opf, "  Inline python disabled\n");
+#endif
+
+#ifdef FAST_SIB
+    fprintf(opf, "  Fast sibiling search enabled\n");
+#else
+    fprintf(opf, "  Fast sibiling search disabled\n");
+#endif
+
+#ifdef USE_HDF4
+    fprintf(opf, "  HDF4 reading enabled\n");
+#else
+    fprintf(opf, "  HDF4 reading disabled\n");
+#endif
+
+#ifdef FLUX_FIX
+    fprintf(opf, "  Flux fix for subgrid siblings enabled\n");
+#else
+    fprintf(opf, "  Flux fix for subgrid siblings disabled\n");
+#endif
+
 
     fprintf(opf, "\n");
     fprintf(opf, "Macro and Parameter Definitions\n");