diff --git a/sys/unix/Makefile.src b/sys/unix/Makefile.src
index 640b961a3..a58257a60 100644
--- a/sys/unix/Makefile.src
+++ b/sys/unix/Makefile.src
@@ -447,23 +447,27 @@ QUIETCC=0
 
 # NB: This is not used for all .c files (see explicit rules in
 #  dependencies).
-ifndef NOSTATICCORE
-	# A normal or cross compile.
+# if NOSTATICCORE
+#    A normal or cross compile.
+# else
+#    NOSTATICCORE: A compile that makes all functions non-static.
+#    Rule /=/ allows 2 definitions of char array brief_feeling
+# fi
 $(TARGETPFX)%.o : %.c
-	$(TARGET_CC) $(TARGET_CFLAGS) -c -o $@ $<
-else
-	# NOSTATICCORE: A compile that makes all functions non-static.
-	# Rule /=/ allows 2 definitions of char array brief_feeling
-$(TARGETPFX)%.o : %.c
-	awk ' \
-		BEGIN{print "#line 1 \"$<\""} \
-		/=/{print;next} \
-		sub(/^static inline/, "") \
-		sub(/^static( |$$)/, "") \
-	' < $< > .$<
-	$(TARGET_CC) $(TARGET_CFLAGS) -c -o $@ .$<
-endif
-
+	if [ x$(NOSTATICCORE) = 'x' ]; then \
+	    $(TARGET_CC) $(TARGET_CFLAGS) -c -o $@ $< ; \
+	else \
+	    ( \
+		$(AWK) ' \
+			BEGIN{print "#line 1 \"$<\""}; \
+			/=/{print;next}; \
+			sub(/^static inline/, ""){print;next}; \
+			sub(/^static( |$$)/, ""){print;next}; \
+			{print}; \
+		' < $< > .$< && \
+		$(TARGET_CC) $(TARGET_CFLAGS) -c -o $@ .$< ; \
+	    ) \
+	fi
 
 # Verbosity definitions, begin
 #   Set QUIETCC=1 above to output less feedback while building.