diff --git a/src/Machine/src/Serval.Machine.Shared/Services/PreprocessBuildJob.cs b/src/Machine/src/Serval.Machine.Shared/Services/PreprocessBuildJob.cs
index 683098a6..0694cbc6 100644
--- a/src/Machine/src/Serval.Machine.Shared/Services/PreprocessBuildJob.cs
+++ b/src/Machine/src/Serval.Machine.Shared/Services/PreprocessBuildJob.cs
@@ -22,6 +22,8 @@ ISharedFileService sharedFileService
 
     private readonly ISharedFileService _sharedFileService = sharedFileService;
 
+    public ICorpusService CorpusService { get; set; } = new CorpusService();
+
     protected override async Task DoWorkAsync(
         string engineId,
         string buildId,
diff --git a/src/Machine/src/Serval.Machine.Shared/Services/ServalTranslationEngineServiceV1.cs b/src/Machine/src/Serval.Machine.Shared/Services/ServalTranslationEngineServiceV1.cs
index bced613b..7d69e874 100644
--- a/src/Machine/src/Serval.Machine.Shared/Services/ServalTranslationEngineServiceV1.cs
+++ b/src/Machine/src/Serval.Machine.Shared/Services/ServalTranslationEngineServiceV1.cs
@@ -91,7 +91,7 @@ await engineService.TrainSegmentPairAsync(
     public override async Task<Empty> StartBuild(StartBuildRequest request, ServerCallContext context)
     {
         ITranslationEngineService engineService = GetEngineService(request.EngineType);
-        Models.ParallelCorpus[] corpora = request.Corpora.Select(Map).ToArray();
+        SIL.ServiceToolkit.Models.ParallelCorpus[] corpora = request.Corpora.Select(Map).ToArray();
         try
         {
             await engineService.StartBuildAsync(
@@ -269,9 +269,9 @@ private static Translation.V1.Phrase Map(SIL.Machine.Translation.Phrase source)
         };
     }
 
-    private static Models.ParallelCorpus Map(Translation.V1.ParallelCorpus source)
+    private static SIL.ServiceToolkit.Models.ParallelCorpus Map(Translation.V1.ParallelCorpus source)
     {
-        return new Models.ParallelCorpus
+        return new SIL.ServiceToolkit.Models.ParallelCorpus
         {
             Id = source.Id,
             SourceCorpora = source.SourceCorpora.Select(Map).ToList(),
@@ -279,7 +279,7 @@ private static Models.ParallelCorpus Map(Translation.V1.ParallelCorpus source)
         };
     }
 
-    private static Models.MonolingualCorpus Map(Translation.V1.MonolingualCorpus source)
+    private static SIL.ServiceToolkit.Models.MonolingualCorpus Map(Translation.V1.MonolingualCorpus source)
     {
         var trainOnChapters = source.TrainOnChapters.ToDictionary(
             kvp => kvp.Key,
@@ -295,7 +295,7 @@ private static Models.MonolingualCorpus Map(Translation.V1.MonolingualCorpus sou
         var pretranslateTextIds = source.PretranslateTextIds.ToHashSet();
         FilterChoice pretranslateFilter = GetFilterChoice(pretranslateChapters, pretranslateTextIds);
 
-        return new Models.MonolingualCorpus
+        return new SIL.ServiceToolkit.Models.MonolingualCorpus
         {
             Id = source.Id,
             Language = source.Language,
@@ -307,12 +307,12 @@ private static Models.MonolingualCorpus Map(Translation.V1.MonolingualCorpus sou
         };
     }
 
-    private static Models.CorpusFile Map(Translation.V1.CorpusFile source)
+    private static SIL.ServiceToolkit.Models.CorpusFile Map(Translation.V1.CorpusFile source)
     {
-        return new Models.CorpusFile
+        return new SIL.ServiceToolkit.Models.CorpusFile
         {
             Location = source.Location,
-            Format = (Models.FileFormat)source.Format,
+            Format = (SIL.ServiceToolkit.Models.FileFormat)source.Format,
             TextId = source.TextId
         };
     }
diff --git a/src/Machine/src/Serval.Machine.Shared/Usings.cs b/src/Machine/src/Serval.Machine.Shared/Usings.cs
index 9029e2c8..bb148b80 100644
--- a/src/Machine/src/Serval.Machine.Shared/Usings.cs
+++ b/src/Machine/src/Serval.Machine.Shared/Usings.cs
@@ -54,7 +54,6 @@
 global using SIL.Machine.Translation;
 global using SIL.Machine.Translation.Thot;
 global using SIL.Machine.Utils;
-global using SIL.Scripture;
 global using SIL.ServiceToolkit.Models;
 global using SIL.ServiceToolkit.Services;
 global using SIL.ServiceToolkit.Utils;
diff --git a/src/Machine/test/Serval.Machine.Shared.Tests/Services/NmtEngineServiceTests.cs b/src/Machine/test/Serval.Machine.Shared.Tests/Services/NmtEngineServiceTests.cs
index 67145c01..d3300709 100644
--- a/src/Machine/test/Serval.Machine.Shared.Tests/Services/NmtEngineServiceTests.cs
+++ b/src/Machine/test/Serval.Machine.Shared.Tests/Services/NmtEngineServiceTests.cs
@@ -301,7 +301,6 @@ public override object ActivateJob(Type jobType)
                         Substitute.For<ILogger<NmtPreprocessBuildJob>>(),
                         _env.BuildJobService,
                         _env.SharedFileService,
-                        Substitute.For<ICorpusService>(),
                         new LanguageTagService()
                     );
                 }
diff --git a/src/Machine/test/Serval.Machine.Shared.Tests/Services/PreprocessBuildJobTests.cs b/src/Machine/test/Serval.Machine.Shared.Tests/Services/PreprocessBuildJobTests.cs
index 539b9c4c..29065719 100644
--- a/src/Machine/test/Serval.Machine.Shared.Tests/Services/PreprocessBuildJobTests.cs
+++ b/src/Machine/test/Serval.Machine.Shared.Tests/Services/PreprocessBuildJobTests.cs
@@ -781,11 +781,10 @@ public PreprocessBuildJob GetBuildJob(TranslationEngineType engineType)
                         Substitute.For<ILogger<NmtPreprocessBuildJob>>(),
                         BuildJobService,
                         SharedFileService,
-                        CorpusService,
                         new LanguageTagService()
                     )
                     {
-                        Seed = 1234
+                        CorpusService = CorpusService
                     };
                 }
                 case TranslationEngineType.SmtTransfer:
@@ -797,12 +796,11 @@ public PreprocessBuildJob GetBuildJob(TranslationEngineType engineType)
                         Substitute.For<ILogger<PreprocessBuildJob>>(),
                         BuildJobService,
                         SharedFileService,
-                        CorpusService,
                         LockFactory,
                         TrainSegmentPairs
                     )
                     {
-                        Seed = 1234
+                        CorpusService = CorpusService
                     };
                 }
                 default:
diff --git a/src/Machine/test/Serval.Machine.Shared.Tests/Services/SmtTransferEngineServiceTests.cs b/src/Machine/test/Serval.Machine.Shared.Tests/Services/SmtTransferEngineServiceTests.cs
index 6b888794..06d0dbde 100644
--- a/src/Machine/test/Serval.Machine.Shared.Tests/Services/SmtTransferEngineServiceTests.cs
+++ b/src/Machine/test/Serval.Machine.Shared.Tests/Services/SmtTransferEngineServiceTests.cs
@@ -687,7 +687,6 @@ public override object ActivateJob(Type jobType)
                         Substitute.For<ILogger<PreprocessBuildJob>>(),
                         _env.BuildJobService,
                         _env.SharedFileService,
-                        Substitute.For<ICorpusService>(),
                         _env._lockFactory,
                         _env.TrainSegmentPairs
                     )
diff --git a/src/Machine/test/Serval.Machine.Shared.Tests/Usings.cs b/src/Machine/test/Serval.Machine.Shared.Tests/Usings.cs
index f58cb973..3ccb5537 100644
--- a/src/Machine/test/Serval.Machine.Shared.Tests/Usings.cs
+++ b/src/Machine/test/Serval.Machine.Shared.Tests/Usings.cs
@@ -28,4 +28,6 @@
 global using SIL.Machine.Utils;
 global using SIL.ObjectModel;
 global using SIL.Scripture;
+global using SIL.ServiceToolkit.Models;
+global using SIL.ServiceToolkit.Services;
 global using SIL.WritingSystems;