Fix nix build

Author: jonringer

nix/mantis.nix

@@ -20,7 +20,7 @@ let
   version =
     let
       versionSbt = builtins.readFile ../version.sbt;
-      captures = builtins.match ''.*version in ThisBuild := "([^"]+)".*'' versionSbt;
+      captures = builtins.match ''.* := "([^"]+)".*'' versionSbt;
     in
     builtins.elemAt captures 0;
 

nix/protoc.patch

@@ -1,12 +1,12 @@
 diff --git a/build.sbt b/build.sbt
-index 4ac21ff40..ccd34412e 100644
+index 59551123e..88eb70276 100644
 --- a/build.sbt
 +++ b/build.sbt
-@@ -43,6 +43,7 @@ def commonSettings(projectName: String): Seq[sbt.Def.Setting[_]] = Seq(
+@@ -50,6 +50,7 @@ def commonSettings(projectName: String): Seq[sbt.Def.Setting[_]] = Seq(
    scalaVersion := `scala-2.13`,
-   // Scalanet snapshots are published to Sonatype after each build.
-   resolvers += "Sonatype OSS Snapshots" at "https://oss.sonatype.org/content/repositories/snapshots",
+   semanticdbEnabled := true, // enable SemanticDB
+   semanticdbVersion := scalafixSemanticdb.revision, // use Scalafix compatible version
 +  PB.runProtoc in Compile := (args => Process("@protobuf@/bin/protoc", args)!),
-   testOptions in Test += Tests
-     .Argument(TestFrameworks.ScalaTest, "-l", "EthashMinerSpec"), // miner tests disabled by default,
-   scalacOptions := Seq(
+   ThisBuild / scalafixScalaBinaryVersion := CrossVersion.binaryScalaVersion(scalaVersion.value),
+   ThisBuild / scalafixDependencies ++= List(
+     "com.github.liancheng" %% "organize-imports" % "0.5.0",