Merge pull request #419 from xexyl/1990-stig

1990/stig/Makefile

@@ -127,7 +127,7 @@ all: data ${TARGET}
 	supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
-	@echo "source stig.sh ; source stig.c" | ${ZSH}
+	@echo "source stig.sh ; source stig.c" | ${SH}
 
 # alternative executable
 #