diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index dac6780..f5e256a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -65,5 +65,6 @@ jobs:
       uses: ./
       with:
         working-directory: sbt-plugin
+        sbt-plugin-version: 2.2.0-SNAPSHOT
 
         
diff --git a/action.yml b/action.yml
index 6ad0fc5..a19b715 100644
--- a/action.yml
+++ b/action.yml
@@ -33,6 +33,10 @@ inputs:
     description: GitHub Personal Access Token (PAT). Defaults to PAT provided by Action runner.
     required: false
     default: ${{ github.token }}
+  sbt-plugin-version:
+    description: Version of the sbt plugin to use.
+    required: false
+    default: '2.1.0'
 runs:
   using: 'node16'
   main: 'dist/index.js'
diff --git a/sbt-plugin/src/main/scala/ch/epfl/scala/GithubDependencyGraphPlugin.scala b/sbt-plugin/src/main/scala/ch/epfl/scala/GithubDependencyGraphPlugin.scala
index 6461520..630281b 100644
--- a/sbt-plugin/src/main/scala/ch/epfl/scala/GithubDependencyGraphPlugin.scala
+++ b/sbt-plugin/src/main/scala/ch/epfl/scala/GithubDependencyGraphPlugin.scala
@@ -1,5 +1,8 @@
 package ch.epfl.scala
 
+import java.nio.file.Path
+import java.nio.file.Paths
+
 import scala.collection.mutable
 import scala.util.Properties
 
@@ -26,6 +29,7 @@ object GithubDependencyGraphPlugin extends AutoPlugin {
 
   object autoImport {
     val githubSubmitInputKey: AttributeKey[SubmitInput] = AttributeKey("githubSubmitInput")
+    val githubWorkspace: AttributeKey[Path] = AttributeKey("githubWorkspace")
     val githubManifestsKey: AttributeKey[Map[String, githubapi.Manifest]] = AttributeKey("githubDependencyManifests")
     val githubProjectsKey: AttributeKey[Seq[ProjectRef]] = AttributeKey("githubProjectRefs")
     val githubDependencyManifest: TaskKey[Option[githubapi.Manifest]] = taskKey(
@@ -106,16 +110,20 @@ object GithubDependencyGraphPlugin extends AutoPlugin {
     // updateFull is needed to have information about callers and reconstruct dependency tree
     val reportResult = Keys.updateFull.result.value
     val projectID = Keys.projectID.value
+    val root = Paths.get(Keys.loadedBuild.value.root).toAbsolutePath
     val scalaVersion = (Keys.artifactName / Keys.scalaVersion).value
     val scalaBinaryVersion = (Keys.artifactName / Keys.scalaBinaryVersion).value
     val crossVersion = CrossVersion.apply(scalaVersion, scalaBinaryVersion)
     val allDirectDependencies = Keys.allDependencies.value
     val baseDirectory = Keys.baseDirectory.value
     val logger = Keys.streams.value.log
-    val input = Keys.state.value.get(githubSubmitInputKey)
+    val state = Keys.state.value
 
-    val onResolveFailure = input.flatMap(_.onResolveFailure)
-    val ignoredConfigs = input.toSeq.flatMap(_.ignoredConfigs).toSet
+    val inputOpt = state.get(githubSubmitInputKey)
+    val workspaceOpt = state.get(githubWorkspace)
+
+    val onResolveFailure = inputOpt.flatMap(_.onResolveFailure)
+    val ignoredConfigs = inputOpt.toSeq.flatMap(_.ignoredConfigs).toSet
     val moduleName = crossVersion(projectID).name
 
     def getReference(module: ModuleID): String =
@@ -183,10 +191,16 @@ object GithubDependencyGraphPlugin extends AutoPlugin {
             }
 
         val projectModuleRef = getReference(projectID)
-        // TODO: find exact build file for this project
-        val file = githubapi.FileInfo("build.sbt")
+        val buildFile = workspaceOpt match {
+          case None => "build.sbt"
+          case Some(workspace) =>
+            if (root.startsWith(workspace)) workspace.relativize(root).resolve("build.sbt").toString
+            else root.resolve("build.sbt").toString
+        }
+        val file = githubapi.FileInfo(buildFile)
         val metadata = Map("baseDirectory" -> JString(baseDirectory.toString))
         val manifest = githubapi.Manifest(projectModuleRef, file, metadata, resolved.toMap)
+        logger.info(s"Created manifest of $buildFile")
         Some(manifest)
     }
   }
diff --git a/sbt-plugin/src/main/scala/ch/epfl/scala/SubmitDependencyGraph.scala b/sbt-plugin/src/main/scala/ch/epfl/scala/SubmitDependencyGraph.scala
index 45a6ccb..7c6de60 100644
--- a/sbt-plugin/src/main/scala/ch/epfl/scala/SubmitDependencyGraph.scala
+++ b/sbt-plugin/src/main/scala/ch/epfl/scala/SubmitDependencyGraph.scala
@@ -1,6 +1,8 @@
 package ch.epfl.scala
 
 import java.nio.charset.StandardCharsets
+import java.nio.file.Path
+import java.nio.file.Paths
 import java.time.Instant
 
 import scala.concurrent.Await
@@ -8,6 +10,7 @@ import scala.concurrent.duration.Duration
 import scala.util.Properties
 import scala.util.Try
 
+import ch.epfl.scala.GithubDependencyGraphPlugin.autoImport
 import ch.epfl.scala.GithubDependencyGraphPlugin.autoImport._
 import ch.epfl.scala.JsonProtocol._
 import ch.epfl.scala.githubapi.JsonProtocol._
@@ -58,6 +61,7 @@ object SubmitDependencyGraph {
 
     val initState = state
       .put(githubSubmitInputKey, input)
+      .put(autoImport.githubWorkspace, githubWorkspace())
       .put(githubManifestsKey, Map.empty[String, Manifest])
       .put(githubProjectsKey, projectRefs)
 
@@ -137,6 +141,7 @@ object SubmitDependencyGraph {
   }
 
   private def checkGithubEnv(): Unit = {
+    githubWorkspace()
     githubWorkflow()
     githubJobName()
     githubRunId()
@@ -147,6 +152,7 @@ object SubmitDependencyGraph {
     githubToken()
   }
 
+  private def githubWorkspace(): Path = Paths.get(githubCIEnv("GITHUB_WORKSPACE")).toAbsolutePath
   private def githubWorkflow(): String = githubCIEnv("GITHUB_WORKFLOW")
   private def githubJobName(): String = githubCIEnv("GITHUB_JOB")
   private def githubRunId(): String = githubCIEnv("GITHUB_RUN_ID")
diff --git a/src/main.ts b/src/main.ts
index 2475c60..74d8ac4 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -6,9 +6,6 @@ import * as fs from 'fs'
 import * as fsPromises from 'fs/promises'
 import * as path from 'path'
 
-// Version of the sbt-github-dependency-submission plugin
-const pluginVersion = '2.1.0'
-
 async function run(): Promise<void> {
   try {
     const token = core.getInput('token')
@@ -25,6 +22,7 @@ async function run(): Promise<void> {
     const uuid = crypto.randomUUID()
     const pluginFile = path.join(projectDir, `github-dependency-submission-${uuid}.sbt`)
 
+    const pluginVersion = core.getInput('sbt-plugin-version')
     const pluginDep = `addSbtPlugin("ch.epfl.scala" % "sbt-github-dependency-submission" % "${pluginVersion}")`
     await fsPromises.writeFile(pluginFile, pluginDep)
     // check that sbt is installed