diff --git a/ReleaseBuilder/Build/Command.Compile.Post.cs b/ReleaseBuilder/Build/Command.Compile.Post.cs
index 60ada0ba7..07f430ea0 100644
--- a/ReleaseBuilder/Build/Command.Compile.Post.cs
+++ b/ReleaseBuilder/Build/Command.Compile.Post.cs
@@ -64,42 +64,6 @@ public static partial class Command
             }
         }
 
-        /// <summary>
-        /// Verify that some files that are expected to be present in the target directory are there
-        /// </summary>
-        /// <param name="buildDir">The build directory to verify</param>
-        /// <param name="target">The target to verify for</param>
-        /// <returns>An awaitable task</returns>
-        public static Task VerifyTargetDirectory(string buildDir, PackageTarget target)
-        {
-            var rootFiles = Directory.EnumerateFiles(buildDir, "*", SearchOption.TopDirectoryOnly)
-                .Where(x => x.EndsWith(".dll", StringComparison.OrdinalIgnoreCase) || x.EndsWith(".exe", StringComparison.OrdinalIgnoreCase))
-                .Select(x => Path.GetFileName(x))
-                .ToHashSet(Duplicati.Library.Utility.Utility.ClientFilenameStringComparer);
-
-            // Random sample of files we expect
-            var probeFiles = new string[] {
-                "System.CommandLine.dll",
-                "System.CommandLine.NamingConventionBinder.dll",
-                "AWSSDK.S3.dll",
-                "CoCoL.dll",
-                "Duplicati.Library.Interface.dll",
-                "Google.Apis.Auth.dll",
-                "Google.Apis.Core.dll",
-                "SQLiteHelper.dll",
-                "SQLite.Interop.dll",
-                "Microsoft.IdentityModel.Abstractions.dll",
-                "System.Reactive.dll",
-                "System.Reactive.Linq.dll"
-            };
-
-            foreach (var f in probeFiles)
-                if (!rootFiles.Contains(f))
-                    throw new Exception($"Expected file {f} for {target.BuildTargetString}, but was not found in build directory {buildDir}");
-
-            return Task.CompletedTask;
-        }
-
         /// <summary>
         /// Set of files that are unwanted despite the OS
         /// </summary>
@@ -150,8 +114,7 @@ public static partial class Command
         /// </summary>
         /// <param name="os">The operating system to get the unwanted filenames for</param>
         /// <returns>The list of unwanted filenames</returns>
-        static IEnumerable<string> UnwantedFileGlobExps(OSType os)
-            => new[] {
+        static IEnumerable<string> UnwantedFileGlobExps(OSType os) => [
             "Thumbs.db",
             "desktop.ini",
             ".DS_Store",
@@ -159,8 +122,9 @@ public static partial class Command
             "*.pdb",
             "*.mdb",
             "._*",
-            os == OSType.Windows ? "*.sh" : "*.bat"
-            };
+            os == OSType.Windows ? "*.sh" : "*.bat",
+            os == OSType.Windows ? "*.sh" : "*.ps1"
+        ];
 
         /// <summary>
         /// Returns a regular expression mapping files that are not wanted in the build folders
diff --git a/ReleaseBuilder/Build/Command.Compile.Verify.cs b/ReleaseBuilder/Build/Command.Compile.Verify.cs
new file mode 100644
index 000000000..91790e1b2
--- /dev/null
+++ b/ReleaseBuilder/Build/Command.Compile.Verify.cs
@@ -0,0 +1,292 @@
+// Copyright (C) 2025, The Duplicati Team
+// https://duplicati.com, hello@duplicati.com
+// 
+// Permission is hereby granted, free of charge, to any person obtaining a 
+// copy of this software and associated documentation files (the "Software"), 
+// to deal in the Software without restriction, including without limitation 
+// the rights to use, copy, modify, merge, publish, distribute, sublicense, 
+// and/or sell copies of the Software, and to permit persons to whom the 
+// Software is furnished to do so, subject to the following conditions:
+// 
+// The above copyright notice and this permission notice shall be included in 
+// all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+// DEALINGS IN THE SOFTWARE.
+using System.Reflection;
+using System.Text.Json;
+
+namespace ReleaseBuilder.Build;
+
+public static partial class Command
+{
+    /// <summary>
+    /// Main compilation of projects
+    /// </summary>
+    private static class Verify
+    {
+        /// <summary>
+        /// Verify that some files that are expected to be present in the target directory are there
+        /// </summary>
+        /// <param name="buildDir">The build directory to verify</param>
+        /// <param name="target">The target to verify for</param>
+        /// <returns>An awaitable task</returns>
+        public static Task VerifyTargetDirectory(string buildDir, PackageTarget target)
+        {
+            var rootFiles = Directory.EnumerateFiles(buildDir, "*", SearchOption.TopDirectoryOnly)
+                .Where(x => x.EndsWith(".dll", StringComparison.OrdinalIgnoreCase) || x.EndsWith(".exe", StringComparison.OrdinalIgnoreCase))
+                .Select(x => Path.GetFileName(x))
+                .ToHashSet(Duplicati.Library.Utility.Utility.ClientFilenameStringComparer);
+
+            // Random sample of files we expect
+            var probeFiles = new string[] {
+                "System.CommandLine.dll",
+                "System.CommandLine.NamingConventionBinder.dll",
+                "AWSSDK.S3.dll",
+                "CoCoL.dll",
+                "Duplicati.Library.Interface.dll",
+                "Google.Apis.Auth.dll",
+                "Google.Apis.Core.dll",
+                "SQLiteHelper.dll",
+                "SQLite.Interop.dll",
+                "Microsoft.IdentityModel.Abstractions.dll",
+                "System.Reactive.dll",
+                "System.Reactive.Linq.dll"
+            };
+
+            foreach (var f in probeFiles)
+                if (!rootFiles.Contains(f))
+                    throw new Exception($"Expected file {f} for {target.BuildTargetString}, but was not found in build directory {buildDir}");
+
+            return Task.CompletedTask;
+        }
+
+        /// <summary>
+        /// Verifies that all expected executables are in the output
+        /// </summary>
+        /// <param name="buildDir">The build directory to verify</param>
+        /// <param name="sourceProjects">The project files to verify</param>
+        /// <param name="target">The target to verify for</param>
+        /// <returns>An awaitable task</returns>
+        public static Task VerifyExecutables(string buildDir, IEnumerable<string> projectFiles, PackageTarget target)
+        {
+            var expected = projectFiles.Select(x => Path.GetFileNameWithoutExtension(x))
+                .Select(x => target.OS == OSType.Windows ? $"{x}.exe" : x);
+
+            foreach (var f in expected)
+                if (!File.Exists(Path.Combine(buildDir, f)))
+                    throw new Exception($"Expected file {f} for {target.BuildTargetString}, but was not found in build directory {buildDir}");
+
+            return Task.CompletedTask;
+        }
+
+        /// <summary>
+        /// Root entry from the dotnet list output
+        /// </summary>
+        /// <param name="Version">The version of the output format</param>
+        /// <param name="Parameters">The parameters used to generate the output</param>
+        /// <param name="Projects">The list of projects found</param>
+        public sealed record RootJson(
+            int Version,
+            string Parameters,
+            IEnumerable<ProjectJson> Projects
+        );
+
+        /// <summary>
+        /// A single project
+        /// </summary>
+        /// <param name="Path">Full path to the csproj file</param>
+        /// <param name="Frameworks">The frameworks found</param>
+        public sealed record ProjectJson(
+            string Path,
+            IEnumerable<FrameworkJson> Frameworks
+        );
+
+        /// <summary>
+        /// Contents of a framework
+        /// </summary>
+        /// <param name="Framework">The framework name</param>
+        /// <param name="TopLevelPackages">Directly included packages</param>
+        /// <param name="TransitivePackages">Packages included due to the top-level packages</param>
+        public sealed record FrameworkJson(
+            string Framework,
+            IEnumerable<TopLevelJson> TopLevelPackages,
+            IEnumerable<PackageJson> TransitivePackages
+        );
+
+        /// <summary>
+        /// A top-level package
+        /// </summary>
+        /// <param name="Id">The package id</param>
+        /// <param name="RequestedVersion">The version requested</param>
+        /// <param name="ResolvedVersion">The resolved version</param>
+        public sealed record TopLevelJson(
+            string Id,
+            string RequestedVersion,
+            string ResolvedVersion
+        );
+
+        /// <summary>
+        /// A transitive package
+        /// </summary>
+        /// <param name="Id">The package id</param>
+        /// <param name="ResolvedVersion">The resolved version</param>
+        public sealed record PackageJson(
+            string Id,
+            string ResolvedVersion
+        );
+
+        /// <summary>
+        /// Executes the dotnet list command and parses the output
+        /// </summary>
+        /// <param name="slnpath">The path to the sln file to analyze</param>
+        /// <returns>The parsed output</returns>
+        public static async Task<RootJson> AnalyzeProject(string slnpath)
+        {
+            var output = await ProcessHelper.ExecuteWithOutput([
+                "dotnet", "list",
+                slnpath, "package",
+                "--include-transitive",
+                "--format", "json"
+            ]).ConfigureAwait(false);
+
+            var root = JsonSerializer.Deserialize<RootJson>(output, new JsonSerializerOptions(JsonSerializerOptions.Default) { PropertyNameCaseInsensitive = true })
+                ?? throw new Exception("Failed to parse JSON output from dotnet list");
+            if (root.Version != 1)
+                throw new Exception($"Unexpected version {root.Version} from dotnet list");
+
+            return root;
+        }
+
+        /// <summary>
+        /// Parses a version string into a Version object
+        /// </summary>
+        /// <param name="version">The nuget version string</param>
+        /// <returns>A .NET version number</returns>
+        private static Version ParseVersion(string version)
+        {
+            var v = new Version(version.Split("-")[0]);
+            return new Version(v.Major, v.Minor, v.Build, Math.Max(0, v.Revision));
+        }
+
+        /// <summary>
+        /// A version that is duplicated in multiple projects
+        /// </summary>
+        /// <param name="Project">The source project</param>
+        /// <param name="Version">The resolved nuget version string</param>
+        /// <param name="ParsedVersion">The resolved parsed version</param>
+        public sealed record DuplicatedVersion(
+            string Project,
+            string Version,
+            Version ParsedVersion
+        );
+
+        /// <summary>
+        /// Parses the output of the dotnet list command and returns a dictionary of duplicated versions
+        /// </summary>
+        /// <param name="input">The parsed output from the dotnet list command</param>
+        /// <returns>A dictionary of duplicated versions, where the key is the package id and the value is a list of projects that use that version</returns>
+        public static Dictionary<string, List<DuplicatedVersion>> GetDuplicatedVersions(RootJson input)
+            => input.Projects
+                .SelectMany(x => x.Frameworks.Select(y => new
+                {
+                    Framework = y,
+                    Project = x.Path
+                }))
+                .SelectMany(x =>
+                    (x.Framework.TopLevelPackages?
+                        .Select(y => new
+                        {
+                            TopLevel = true,
+                            y.Id,
+                            y.ResolvedVersion,
+                            x.Project
+                        }) ?? [])
+                        .Concat(x.Framework.TransitivePackages?.Select(y => new { TopLevel = false, y.Id, y.ResolvedVersion, x.Project }) ?? [])
+                )
+                .GroupBy(x => x.Id, x => new DuplicatedVersion(x.Project, x.ResolvedVersion, ParseVersion(x.ResolvedVersion)))
+                .Where(x => x.DistinctBy(y => y.ParsedVersion).Count() > 1)
+                .ToDictionary(
+                    x => x.Key,
+                    x => x.ToList()
+                );
+
+        /// <summary>
+        /// Finds the maximum nuget versions of packages
+        /// </summary>
+        /// <param name="input">The parsed output from the dotnet list command</param>
+        /// <returns>A list of nuget versions for each package</returns>
+        public static Dictionary<string, Version> FindMaxNugetVersions(RootJson input)
+            => input.Projects
+                .SelectMany(x => x.Frameworks)
+                .SelectMany(x =>
+                    (x.TopLevelPackages?
+                        .Select(x => new { TopLevel = true, x.Id, x.ResolvedVersion }) ?? [])
+                        .Concat(x.TransitivePackages?.Select(x => new { TopLevel = false, x.Id, x.ResolvedVersion }) ?? [])
+                )
+                .Where(x => !x.TopLevel)
+                .GroupBy(x => x.Id, x => x.ResolvedVersion)
+                .Select(x => new { x.Key, Version = x.MaxBy(ParseVersion) })
+                .ToDictionary(
+                    x => x.Key,
+                    x => ParseVersion(x.Version!)
+                );
+
+        /// <summary>
+        /// List of known wrong versions, where the assembly version is not the same as the nuget version
+        /// </summary>
+        private static Dictionary<string, Version> ManuallyFixedVersions = new Dictionary<string, Version>
+        {
+            // Using v3.3 for assembly, but 3.7 in nuget
+            { "AWSSDK.Core", new Version(3, 3, 0, 0) },
+            
+            // Using the Framework version, not the package version
+            { "Microsoft.CSharp", new Version(8, 0, 0, 0) },
+            { "System.Memory", new Version(8, 0, 0, 0) },
+            { "System.Security.AccessControl", new Version(8, 0, 0, 0) },
+            { "System.Security.Principal.Windows", new Version(8, 0, 0, 0) },
+            { "System.Security.Cryptography.Algorithms", new Version(8, 0, 0, 0) },
+            { "System.Security.Cryptography.Cng", new Version(8, 0, 0, 0) },
+            
+            // Using v9.0 for assembly, but 9.0.2 in nuget
+            { "System.IO.Pipelines", new Version(9, 0, 0, 0) }
+        };
+
+        /// <summary>
+        /// Verifies that the versions of the assemblies in the output folder are the maximum versions
+        /// </summary>
+        /// <param name="folder">The folder to check</param>
+        /// <param name="input">The parsed output from the dotnet list command</param>
+        /// <returns>An awaitable task</returns>
+        public static Task VerifyDuplicatedVersionsAreMaxVersions(string folder, RootJson input)
+        {
+            var duplicatedVersions = GetDuplicatedVersions(input)
+                .Select(x =>
+                {
+                    if (ManuallyFixedVersions.TryGetValue(x.Key, out var version))
+                        return new KeyValuePair<string, List<DuplicatedVersion>>(x.Key, [new DuplicatedVersion(x.Value.First().Project, x.Value.First().Version, version)]);
+                    return new KeyValuePair<string, List<DuplicatedVersion>>(x.Key, x.Value);
+                });
+
+            foreach (var entry in duplicatedVersions)
+            {
+                var maxVersion = entry.Value.MaxBy(x => x.ParsedVersion)
+                    ?? throw new Exception($"Failed to find max version for {entry.Key}");
+                var filename = Path.Combine(folder, $"{entry.Key}.dll");
+                if (!File.Exists(filename))
+                    continue;
+
+                var assemblyVersion = AssemblyName.GetAssemblyName(filename).Version;
+                if (assemblyVersion != maxVersion.ParsedVersion)
+                    throw new Exception($"Version mismatch for {filename}: expected {maxVersion.ParsedVersion}, got {assemblyVersion}");
+            }
+
+            return Task.CompletedTask;
+        }
+    }
+}
\ No newline at end of file
diff --git a/ReleaseBuilder/Build/Command.Compile.cs b/ReleaseBuilder/Build/Command.Compile.cs
index 7efd87c36..6640a7efb 100644
--- a/ReleaseBuilder/Build/Command.Compile.cs
+++ b/ReleaseBuilder/Build/Command.Compile.cs
@@ -53,56 +53,65 @@ public static partial class Command
             else
                 Console.WriteLine($"Building {buildArchTargets.Length} versions");
 
+            var buildOutputFolders = buildArchTargets.ToDictionary(x => x, x => Path.Combine(buildDir, x.BuildTargetString));
             var temporarySolutionFiles = new Dictionary<PackageTarget, string>();
+            var targetExecutables = new Dictionary<PackageTarget, List<string>>();
             var distinctSolutions = buildArchTargets.GroupBy(x => $"{x.InterfaceString}{(x.OS == OSType.Windows ? $"-{x.OSString}" : "")}").ToArray();
             Console.WriteLine($"Creating {distinctSolutions.Length} temporary solution files");
             foreach (var tk in distinctSolutions)
             {
+                // Don't create a solution if all the output folders exist
+                if (tk.All(x => Directory.Exists(buildOutputFolders[x])))
+                    continue;
+
                 var tmpslnfile = Path.Combine(buildDir, $"Duplicati-{tk.Key}.sln");
-                if (File.Exists(tmpslnfile))
-                    File.Delete(tmpslnfile);
-
-                var logOut = Path.Combine(logFolder, $"create-{tmpslnfile}.log");
-                using var logStream = new FileStream(logOut, FileMode.Create, FileAccess.Write, FileShare.Read);
-
-                await ProcessHelper.ExecuteWithOutput([
-                    "dotnet", "new", "sln",
-                    "--name", Path.GetFileNameWithoutExtension(tmpslnfile),
-                    "--output", buildDir
-                ],
-                logStream
-                ).ConfigureAwait(false);
 
                 var target = tk.First();
                 if (!sourceProjects.TryGetValue(target.Interface, out var buildProjects))
                     throw new InvalidOperationException($"No projects found for {tk.Key}");
 
-                // Add the projects to the solution
-                foreach (var proj in buildProjects)
-                {
-                    if (target.OS != OSType.Windows && windowsOnlyProjects.Contains(proj))
-                        continue;
+                var actualBuildProjects = buildProjects
+                    .Where(x => target.OS == OSType.Windows || !windowsOnlyProjects.Contains(x))
+                    .ToList();
 
-                    var projpath = Path.Combine(baseDir, proj);
-                    if (!File.Exists(projpath))
-                        throw new FileNotFoundException($"Project file {projpath} not found");
+                // Faster debugging, keep the solution file
+                if (!File.Exists(tmpslnfile))
+                {
+                    var logOut = Path.Combine(logFolder, $"create-{Path.GetFileName(tmpslnfile)}.log");
+                    using var logStream = new FileStream(logOut, FileMode.Create, FileAccess.Write, FileShare.Read);
 
                     await ProcessHelper.ExecuteWithOutput([
-                        "dotnet", "sln", tmpslnfile,
-                        "add", projpath
-                    ],
-                    logStream
-                    ).ConfigureAwait(false);
+                        "dotnet", "new", "sln",
+                        "--name", Path.GetFileNameWithoutExtension(tmpslnfile),
+                        "--output", buildDir
+                    ], logStream).ConfigureAwait(false);
+
+                    // Add the projects to the solution
+                    foreach (var proj in actualBuildProjects)
+                    {
+                        var projpath = Path.Combine(baseDir, proj);
+                        if (!File.Exists(projpath))
+                            throw new FileNotFoundException($"Project file {projpath} not found");
+
+                        await ProcessHelper.ExecuteWithOutput([
+                            "dotnet", "sln", tmpslnfile,
+                            "add", projpath
+                        ], logStream).ConfigureAwait(false);
+                    }
                 }
 
                 foreach (var s in tk)
+                {
                     temporarySolutionFiles[s] = tmpslnfile;
+                    targetExecutables[s] = actualBuildProjects;
+                }
             }
 
-            foreach (var target in buildArchTargets)
-            {
-                var outputFolder = Path.Combine(buildDir, target.BuildTargetString);
+            // Start the task now
+            var verifyRootJson = Verify.AnalyzeProject(Path.Combine(baseDir, "Duplicati.sln"));
 
+            foreach ((var target, var outputFolder) in buildOutputFolders)
+            {
                 // Faster iteration for debugging is to keep the build folder
                 if (keepBuilds && Directory.Exists(outputFolder))
                 {
@@ -145,7 +154,9 @@ public static partial class Command
 
                     // Perform any post-build steps, cleaning and signing as needed
                     await PostCompile.PrepareTargetDirectory(baseDir, tmpfolder, target, rtcfg, keepBuilds);
-                    await PostCompile.VerifyTargetDirectory(tmpfolder, target);
+                    await Verify.VerifyTargetDirectory(tmpfolder, target);
+                    await Verify.VerifyExecutables(tmpfolder, targetExecutables[target], target);
+                    await Verify.VerifyDuplicatedVersionsAreMaxVersions(tmpfolder, await verifyRootJson.ConfigureAwait(false));
 
                     // Move the final build to the output folder
                     Directory.Move(tmpfolder, outputFolder);