Doesn't honour sbt.version

[dwijnand]

Compare using this launcher (sbt) with using the official launcher (sbtx):

12:43:25 $ sbt -Dsbt.version=1.2.8 'show sbtVersion'
[warn] sbt version mismatch, current: 1.3.5, in build.properties: "1.2.8", use 'reboot' to use the new value.
[info] Loading settings for project global-plugins from global-plugins.sbt ...
[info] Loading global plugins from /Users/dnw/.dotfiles/.sbt/1.0/plugins
[info] Loading settings for project t-sbt-cp-order-build from plugins.sbt ...
[info] Loading project definition from /s/t-sbt-cp-order/project
[info] Loading settings for project t from build.sbt ...
[info] Set current project to t (in build file:/s/t-sbt-cp-order/)
[info] 1.3.5

12:44:14 $ sbtx -Dsbt.version=1.2.8 'show sbtVersion'
[warn] sbt version mismatch, current: 1.2.8, in build.properties: "1.3.5", use 'reboot' to use the new value.
[info] Loading settings for project global-plugins from global-plugins.sbt ...
[info] Loading global plugins from /Users/dnw/.dotfiles/.sbt/1.0/plugins
[info] Loading settings for project t-sbt-cp-order-build from plugins.sbt ...
[info] Loading project definition from /s/t-sbt-cp-order/project
[info] Loading settings for project t from build.sbt ...
[info] Set current project to t (in build file:/s/t-sbt-cp-order/)
[info] 1.2.8

(It's kind of cute how the warning message switches too. 😄)