Changes at https://www.sqlite.org/releaselog/3_37_1.html.
The source to be used should be sqlite-autoconf-3350500.tar.gz instead of the souce sqlite-amalgamation-3350500.zip used by the port. This reverts commit eccd5a4d3926c0716dd11bdf3242da56116f68c6.
Changes at https://www.sqlite.org/releaselog/3_35_5.html.