Some make implementations don't support -C (I'm looking at you Theo).

3rdp/build/GNUmakefile

@@ -49,6 +49,6 @@ $(CRYPTLIB_BUILD): $(3RDP_ROOT)$(DIRSEP)dist/cryptlib.zip $(3RDP_ROOT)$(DIRSEP)b
 	$(QUIET)unzip -oa $(3RDPDISTDIR)$(DIRSEP)cryptlib.zip -d $(CRYPT_SRC)
 	$(QUIET)patch -p0 -d $(CRYPT_SRC) < random_exit.patch
 	$(QUIET)patch -p0 -d $(CRYPT_SRC) < SSL-fix.patch
-	$(QUIET)env - PATH=$(PATH) make -C $(CRYPT_SRC)
+	$(QUIET)cd $(CRYPT_SRC) && env - PATH=$(PATH) make
 	$(QUIET)cp $(CRYPT_SRC)$(DIRSEP)libcl.a $(CRYPT_IDIR)
 	$(QUIET)cp $(CRYPT_SRC)$(DIRSEP)cryptlib.h $(CRYPT_IDIR)