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+cc65 releases are few and far between, so unlike most SlackBuilds, this
+one packages a git snapshot. The build is only updated once or twice a
+year, but you might find you need a later snapshot that fixes a bug or
+adds a feature that you need.
+
+To build a specific tag or commit of the cc65 source, use the git2tarxz.sh
+script included in the SlackBuild directory. For instance, to build a
+package of the 2.17 release:
+
+# sh git2tarxz.sh V2.17
+
+You could use a commit hash instead:
+
+# sh git2tarxz.sh 8e75906
+
+The last lines of output from git2tarxz.sh show the filename of
+the created tarball and the VERSION you should set in the script's
+environment. For the above example:
+
+Created tarball: cc65-2.17_20180307.tar.xz
+VERSION=2.17_20180307
+
+So you'd this this command to build the package:
+
+# VERSION=2.17_20180307 sh ./cc65.SlackBuild
+
+Notes:
+
+- Obviously I haven't tested every single commit. There are thousands
+  of them. If the SlackBuild fails, either use a different commit,
+  or contact me on IRC (user Urchlay on FreeNode ##slackbuilds or the
+  email address in the .info file) and I'll try to help.
+
+- git2tarxz.sh will probably fail on Slackware-current. Use 14.2 to
+  prepare the source, even if you're going to build on -current. See
+  the comments in the script about linuxdoc-tools for details.
+
+- The output of "cc65 --version" will always include the git commit that
+  was used to build it. This might be useful to know, if you're messing
+  around with different revisions.