+# TERMUX_PKG_SRCURL=http://potrace.sourceforge.net/download/$TERMUX_PKG_VERSION/potrace-$TERMUX_PKG_VERSION.tar.gz
+# 2018-02-15: Switching to alternative url as above url is down:
+TERMUX_PKG_SRCURL=https://distfiles.macports.org/potrace/potrace-$TERMUX_PKG_VERSION.tar.gz