Wrong scalac compiler version invoked by SBT - scala

Question

I'm using Fedora Linux and sbt. I think I've tried everything, but I can't persuade sbt to use Scala 2.12.2 to compile my project.
When I compile the same project with:
Gradle,
IntelliJ IDEA,
SBT on a different Linux distro,
everything works. I just can't get it to work on Fedora Linux and sbt.
Here's my build.sbt:
scalaVersion := "2.12.2"
scalaVersion in ThisBuild := "2.12.2"
crossScalaVersions := Seq(scalaVersion.value)
scalacOptions := Seq("-unchecked", "-deprecation", "-feature", "-language:postfixOps")
libraryDependencies ++= Seq("org.xerial" % "sqlite-jdbc" % "3.18.0",
"org.apache.httpcomponents" % "httpclient" % "4.5.3",
"commons-codec" % "commons-codec" % "1.10",
"commons-cli" % "commons-cli" % "1.4",
"org.hjson" % "hjson" % "1.0.0",
"log4j" % "log4j" % "1.2.17",
"org.zeromq" % "jeromq" % "0.4.0",
"com.nimbusds" % "nimbus-jose-jwt" % "4.23",
"ws.wamp.jawampa" % "jawampa-core" % "0.5.0",
"ws.wamp.jawampa" % "jawampa-netty" % "0.5.0",
"org.glassfish.tyrus" % "tyrus-websocket-core" % "1.2.1",
"org.glassfish.tyrus.bundles" % "tyrus-standalone-client" % "1.13.1",
"org.scalactic" %% "scalactic" % "3.0.1",
"org.scalatest" %% "scalatest" % "3.0.1" % "test",
"org.postgresql" % "postgresql" % "42.1.1")
// https://mvnrepository.com/artifact/org.apache.commons/commons-compress
libraryDependencies += "org.apache.commons" % "commons-compress" % "1.14"
// https://mvnrepository.com/artifact/org.tukaani/xz
libraryDependencies += "org.tukaani" % "xz" % "1.6"
// https://mvnrepository.com/artifact/net.sourceforge.htmlunit/htmlunit
libraryDependencies += "net.sourceforge.htmlunit" % "htmlunit" % "2.27"
Here's my project/build.properties:
sbt.version=0.13.15
scala.version=2.12.2
build.scala.version=2.12.2
def.scala.versions=2.12.2
Every time I start sbt and try to compile, I'm getting some syntax errors (I've changed some strings to xxx, sorry):
[info] Compiling 76 Scala sources to /home/antek/dev/scala/xxx/target/scala-2.12/classes...
[error] /home/antek/dev/scala/xxx/src/main/scala/api/xxx.scala:168: macros cannot be partially applied
[error] httpPost(transApi, args + ("xxx" → f"$currentTime%d"), "API-Key", "API-Hash")
[error] ^
[error] /home/antek/dev/scala/xxx/src/main/scala/api/xxx.scala:39: macros cannot be partially applied
[error] httpPost(transApi, args + ("xxx" → f"$currentTime%d"), "API-Key", "API-Hash")
[error] ^
[error] /home/antek/dev/scala/xxx/src/main/scala/api/HttpSignOperation.scala:51: macros cannot be partially applied
[error] Log.put(f"HTTP GET returned status $status%d")
[error] ^
[error] /home/antek/dev/scala/xxx/src/main/scala/api/HttpSignOperation.scala:82: macros cannot be partially applied
[error] Log.put(f"HTTP POST returned status $status%d")
[error] ^
[error] /home/antek/dev/scala/xxx/src/main/scala/api/JWSOperation.scala:38: macros cannot be partially applied
[error] Log.put(f"HTTP POST returned status $status%d")
[error] ^
[error]
[error] while compiling: /home/antek/dev/scala/xxx/src/main/scala/api/Order.scala
[error] during phase: typer
[error] library version: version 2.10.4
[error] compiler version: version 2.10.4
[error] reconstructed args: -classpath /home/antek/dev/scala/xxx/target/scala-2.12/classes:/home/antek/.ivy2/cache/org.xer[... cut ...]64/jre/classes:/home/antek/.ivy2/cache/org.scala-lang/scala-library/jars/scala-library-2.12.2.jar