diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 31f67e7154..daf3876405 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,4 +1,4 @@
-#### 1.9.2 - 01.06.2015
+#### 1.9.3 - 01.06.2015
 * Do not duplicate files in the nupkg - https://github.com/fsprojects/Paket/issues/851
 
 #### 1.9.1 - 01.06.2015
diff --git a/src/Paket.Core/NupkgWriter.fs b/src/Paket.Core/NupkgWriter.fs
index 64aee01a45..0283db1773 100644
--- a/src/Paket.Core/NupkgWriter.fs
+++ b/src/Paket.Core/NupkgWriter.fs
@@ -195,15 +195,21 @@ let Write (core : CompleteCoreInfo) optional workingDir outputDir =
     use zipToCreate = new FileStream(outputPath, FileMode.Create)
     use zipFile = new ZipArchive(zipToCreate,ZipArchiveMode.Create)
 
-    let entries = System.Collections.Generic.List<_>()
+    let entries = System.Collections.Generic.List<_>()    
     
-    let addEntry (zipFile : ZipArchive) path writerF = 
+    let addEntry path writerF = 
+        if entries.Contains(path) then () else
         entries.Add path |> ignore
         let entry = zipFile.CreateEntry(path)        
         use stream = entry.Open()
         writerF stream
         stream.Close()
 
+    let addEntryFromFile path source =
+        if entries.Contains(path) then () else
+        entries.Add path |> ignore
+        zipFile.CreateEntryFromFile(source,path) |> ignore
+
     let ensureValidTargetName (target:string) =
         match target.Replace(" ", "%20").Replace("\\", "/") with
         | t when t.EndsWith("/")         -> t
@@ -216,8 +222,7 @@ let Write (core : CompleteCoreInfo) optional workingDir outputDir =
         for file in Directory.EnumerateFiles(source,"*.*",SearchOption.TopDirectoryOnly) do
             let fi = FileInfo file
             let path = Path.Combine(target,fi.Name)
-            entries.Add path |> ignore
-            zipFile.CreateEntryFromFile(fi.FullName,path) |> ignore
+            addEntryFromFile path fi.FullName
 
         for dir in Directory.EnumerateDirectories(source,"*",SearchOption.TopDirectoryOnly) do
             let di = DirectoryInfo dir
@@ -233,20 +238,18 @@ let Write (core : CompleteCoreInfo) optional workingDir outputDir =
             if File.Exists source then
                 let fi = FileInfo(source)
                 let path = Path.Combine(targetFileName,fi.Name)
-                entries.Add path |> ignore
-                zipFile.CreateEntryFromFile(source, path) |> ignore
+                addEntryFromFile path source
             else 
                 failwithf "Could not find source file %s" source
 
     // add metadata
     for path, writer in writeNupkg core optional do 
-        addEntry zipFile path writer
+        addEntry path writer
     
     entries
-    |> Seq.distinct
     |> Seq.toList
     |> contentTypeDoc
     |> xDocWriter
-    |> addEntry zipFile contentTypePath
+    |> addEntry contentTypePath
 
     outputPath
diff --git a/src/Paket/Paket.fsproj b/src/Paket/Paket.fsproj
index da6541ab3c..535023c82c 100644
--- a/src/Paket/Paket.fsproj
+++ b/src/Paket/Paket.fsproj
@@ -32,10 +32,10 @@
     <StartProgram>paket.exe</StartProgram>
     <StartWorkingDirectory>D:\code\Pakettest</StartWorkingDirectory>
     <StartWorkingDirectory>D:\code\Paketkopie</StartWorkingDirectory>
-    <StartArguments>install</StartArguments>
+    <StartArguments>pack output bin/ version  1.2.4 releaseNotes  "Implement Hashcode-based sifting extensions."</StartArguments>
     <StartAction>Project</StartAction>
     <StartProgram>paket.exe</StartProgram>
-    <StartWorkingDirectory>d:\code\pakettest</StartWorkingDirectory>
+    <StartWorkingDirectory>d:\code\fspickler</StartWorkingDirectory>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <DebugType>pdbonly</DebugType>