diff --git a/Formaline/src/make.configuration.deps b/Formaline/src/make.configuration.deps
index 18fbae4..6be8b86 100644
--- a/Formaline/src/make.configuration.deps
+++ b/Formaline/src/make.configuration.deps
@@ -132,7 +132,7 @@ $(TARBALL_DIR)/config-Cactus.c: $(TARBALL_DIR)/config-Cactus.files $(CCTK_HOME)/
         # 3.81 to hang due to a make bug
        if ( cd $(CONFIGS_DIR) && ( $(TAR) czf $(TARBALL_DIR)/config-Cactus.tar.gz -T $< || [ $$? -lt $(TAR_ERROR_THRESHOLD) ] ) ) ; then \
            $(RM) -f $(@:%.c=%-????.c) && \
-           $(FORMALINE_BIN_DIR)/makeblob.pl $(@:%.c=%) '' CactusConfig < $(TARBALL_DIR)/config-Cactus.tar.gz && \
+           $(PERL) $(FORMALINE_BIN_DIR)/makeblob.pl $(@:%.c=%) '' CactusConfig < $(TARBALL_DIR)/config-Cactus.tar.gz && \
             rm $(TARBALL_DIR)/config-Cactus.tar.gz ; \
         else \
             exit $$? ; \
@@ -203,7 +203,7 @@ $(TARBALL_DIR)/flesh-Cactus.c: $(TARBALL_DIR)/flesh-Cactus.files $(CCTK_HOME)/ar
         # 3.81 to hang due to a make bug
        if ( cd $(CCTK_HOME) && ( $(TAR) czf $(TARBALL_DIR)/flesh-Cactus.tar.gz -T $< || [ $$? -lt $(TAR_ERROR_THRESHOLD) ] ) ) ; then \
            $(RM) -f $(@:%.c=%-????.c) && \
-           $(FORMALINE_BIN_DIR)/makeblob.pl $(@:%.c=%) '' Cactus < $(TARBALL_DIR)/flesh-Cactus.tar.gz && \
+           $(PERL) $(FORMALINE_BIN_DIR)/makeblob.pl $(@:%.c=%) '' Cactus < $(TARBALL_DIR)/flesh-Cactus.tar.gz && \
             $(RM) $(TARBALL_DIR)/flesh-Cactus.tar.gz ; \
         else \
         
--

Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2811/formaline-optionally-use-non-system-perl