diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 71c76f5ae6..dc4a72f1ba 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,3 +1,6 @@
+#### 2.39.4 - 28.12.2015
+* BUGFIX: Call OnCompleted in Observable.flatten - https://github.com/fsprojects/Paket/pull/1330
+
 #### 2.39.3 - 28.12.2015
 * BUGFIX: Allow to restore packages from private feeds - https://github.com/fsprojects/Paket/issues/1326
 
diff --git a/paket.dependencies b/paket.dependencies
index 57ca54aabf..8beebaa10c 100644
--- a/paket.dependencies
+++ b/paket.dependencies
@@ -3,7 +3,6 @@ source https://nuget.org/api/v2
 nuget Newtonsoft.Json redirects: force
 nuget Argu
 nuget FSharp.Core redirects: force
-nuget FSharp.Control.Reactive
 nuget Chessie
 
 github fsharp/FAKE src/app/FakeLib/Globbing/Globbing.fs
diff --git a/paket.lock b/paket.lock
index 32f1f23865..e7258f0a26 100644
--- a/paket.lock
+++ b/paket.lock
@@ -4,19 +4,8 @@ NUGET
     Argu (1.1.3)
     Chessie (0.2.2)
       FSharp.Core
-    FSharp.Control.Reactive (3.2.0)
-      FSharp.Core (>= 3.1.2)
-      Rx-Core (>= 2.2.5)
-      Rx-Interfaces (>= 2.2.5)
-      Rx-Linq (>= 2.2.5)
     FSharp.Core (4.0.0.1) - redirects: force
     Newtonsoft.Json (7.0.1) - redirects: force
-    Rx-Core (2.2.5)
-      Rx-Interfaces (>= 2.2.5)
-    Rx-Interfaces (2.2.5)
-    Rx-Linq (2.2.5)
-      Rx-Core (>= 2.2.5)
-      Rx-Interfaces (>= 2.2.5)
 GITHUB
   remote: fsharp/FAKE
   specs:
diff --git a/src/Paket.Core/Paket.Core.fsproj b/src/Paket.Core/Paket.Core.fsproj
index 6345feb4db..cc8bf9567c 100644
--- a/src/Paket.Core/Paket.Core.fsproj
+++ b/src/Paket.Core/Paket.Core.fsproj
@@ -161,17 +161,6 @@
       </ItemGroup>
     </When>
   </Choose>
-  <Choose>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1')">
-      <ItemGroup>
-        <Reference Include="FSharp.Control.Reactive">
-          <HintPath>..\..\packages\FSharp.Control.Reactive\lib\net40\FSharp.Control.Reactive.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-  </Choose>
   <Choose>
     <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v2.0' Or $(TargetFrameworkVersion) == 'v3.0' Or $(TargetFrameworkVersion) == 'v3.5')">
       <ItemGroup>
@@ -293,280 +282,4 @@
       </ItemGroup>
     </When>
   </Choose>
-  <Choose>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETCore'">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Core">
-          <HintPath>..\..\packages\Rx-Core\lib\windows8\System.Reactive.Core.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0')">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Core">
-          <HintPath>..\..\packages\Rx-Core\lib\net40\System.Reactive.Core.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1')">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Core">
-          <HintPath>..\..\packages\Rx-Core\lib\net45\System.Reactive.Core.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="$(TargetFrameworkIdentifier) == 'Silverlight' And $(TargetFrameworkVersion) == 'v5.0'">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Core">
-          <HintPath>..\..\packages\Rx-Core\lib\sl5\System.Reactive.Core.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="$(TargetFrameworkIdentifier) == 'WindowsPhone' And $(TargetFrameworkVersion) == 'v7.1'">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Core">
-          <HintPath>..\..\packages\Rx-Core\lib\windowsphone71\System.Reactive.Core.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="$(TargetFrameworkIdentifier) == 'WindowsPhone' And ($(TargetFrameworkVersion) == 'v8.0' Or $(TargetFrameworkVersion) == 'v8.1')">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Core">
-          <HintPath>..\..\packages\Rx-Core\lib\windowsphone8\System.Reactive.Core.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="($(TargetFrameworkIdentifier) == 'MonoAndroid') Or ($(TargetFrameworkIdentifier) == 'MonoTouch') Or ($(TargetFrameworkIdentifier) == 'Xamarin.iOS') Or ($(TargetFrameworkIdentifier) == 'Xamarin.Mac') Or ($(TargetFrameworkProfile) == 'Profile7') Or ($(TargetFrameworkProfile) == 'Profile31') Or ($(TargetFrameworkProfile) == 'Profile44') Or ($(TargetFrameworkProfile) == 'Profile49') Or ($(TargetFrameworkProfile) == 'Profile78')">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Core">
-          <HintPath>..\..\packages\Rx-Core\lib\portable-windows8+net45+wp8\System.Reactive.Core.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="($(TargetFrameworkIdentifier) == 'WindowsPhoneApp') Or ($(TargetFrameworkProfile) == 'Profile32')">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Core">
-          <HintPath>..\..\packages\Rx-Core\lib\portable-win81+wpa81\System.Reactive.Core.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="($(TargetFrameworkProfile) == 'Profile5') Or ($(TargetFrameworkProfile) == 'Profile6') Or ($(TargetFrameworkProfile) == 'Profile14') Or ($(TargetFrameworkProfile) == 'Profile19') Or ($(TargetFrameworkProfile) == 'Profile24') Or ($(TargetFrameworkProfile) == 'Profile37') Or ($(TargetFrameworkProfile) == 'Profile42') Or ($(TargetFrameworkProfile) == 'Profile47') Or ($(TargetFrameworkProfile) == 'Profile147') Or ($(TargetFrameworkProfile) == 'Profile158')">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Core">
-          <HintPath>..\..\packages\Rx-Core\lib\portable-net40+sl5+win8+wp8\System.Reactive.Core.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="($(TargetFrameworkProfile) == 'Profile84') Or ($(TargetFrameworkProfile) == 'Profile111') Or ($(TargetFrameworkProfile) == 'Profile151') Or ($(TargetFrameworkProfile) == 'Profile157') Or ($(TargetFrameworkProfile) == 'Profile259')">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Core">
-          <HintPath>..\..\packages\Rx-Core\lib\portable-net45+winrt45+wp8+wpa81\System.Reactive.Core.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-  </Choose>
-  <Choose>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETCore'">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Interfaces">
-          <HintPath>..\..\packages\Rx-Interfaces\lib\windows8\System.Reactive.Interfaces.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0')">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Interfaces">
-          <HintPath>..\..\packages\Rx-Interfaces\lib\net40\System.Reactive.Interfaces.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1')">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Interfaces">
-          <HintPath>..\..\packages\Rx-Interfaces\lib\net45\System.Reactive.Interfaces.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="$(TargetFrameworkIdentifier) == 'Silverlight' And $(TargetFrameworkVersion) == 'v5.0'">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Interfaces">
-          <HintPath>..\..\packages\Rx-Interfaces\lib\sl5\System.Reactive.Interfaces.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="$(TargetFrameworkIdentifier) == 'WindowsPhone' And $(TargetFrameworkVersion) == 'v7.1'">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Interfaces">
-          <HintPath>..\..\packages\Rx-Interfaces\lib\windowsphone71\System.Reactive.Interfaces.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="$(TargetFrameworkIdentifier) == 'WindowsPhone' And ($(TargetFrameworkVersion) == 'v8.0' Or $(TargetFrameworkVersion) == 'v8.1')">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Interfaces">
-          <HintPath>..\..\packages\Rx-Interfaces\lib\windowsphone8\System.Reactive.Interfaces.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="($(TargetFrameworkIdentifier) == 'MonoAndroid') Or ($(TargetFrameworkIdentifier) == 'MonoTouch') Or ($(TargetFrameworkIdentifier) == 'Xamarin.iOS') Or ($(TargetFrameworkIdentifier) == 'Xamarin.Mac') Or ($(TargetFrameworkProfile) == 'Profile7') Or ($(TargetFrameworkProfile) == 'Profile31') Or ($(TargetFrameworkProfile) == 'Profile44') Or ($(TargetFrameworkProfile) == 'Profile49') Or ($(TargetFrameworkProfile) == 'Profile78')">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Interfaces">
-          <HintPath>..\..\packages\Rx-Interfaces\lib\portable-windows8+net45+wp8\System.Reactive.Interfaces.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="($(TargetFrameworkIdentifier) == 'WindowsPhoneApp') Or ($(TargetFrameworkProfile) == 'Profile32')">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Interfaces">
-          <HintPath>..\..\packages\Rx-Interfaces\lib\portable-win81+wpa81\System.Reactive.Interfaces.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="($(TargetFrameworkProfile) == 'Profile5') Or ($(TargetFrameworkProfile) == 'Profile6') Or ($(TargetFrameworkProfile) == 'Profile14') Or ($(TargetFrameworkProfile) == 'Profile19') Or ($(TargetFrameworkProfile) == 'Profile24') Or ($(TargetFrameworkProfile) == 'Profile37') Or ($(TargetFrameworkProfile) == 'Profile42') Or ($(TargetFrameworkProfile) == 'Profile47') Or ($(TargetFrameworkProfile) == 'Profile147') Or ($(TargetFrameworkProfile) == 'Profile158')">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Interfaces">
-          <HintPath>..\..\packages\Rx-Interfaces\lib\portable-net40+sl5+win8+wp8\System.Reactive.Interfaces.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="($(TargetFrameworkProfile) == 'Profile84') Or ($(TargetFrameworkProfile) == 'Profile111') Or ($(TargetFrameworkProfile) == 'Profile151') Or ($(TargetFrameworkProfile) == 'Profile157') Or ($(TargetFrameworkProfile) == 'Profile259')">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Interfaces">
-          <HintPath>..\..\packages\Rx-Interfaces\lib\portable-net45+winrt45+wp8+wpa81\System.Reactive.Interfaces.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-  </Choose>
-  <Choose>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETCore'">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Linq">
-          <HintPath>..\..\packages\Rx-Linq\lib\windows8\System.Reactive.Linq.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0')">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Linq">
-          <HintPath>..\..\packages\Rx-Linq\lib\net40\System.Reactive.Linq.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1')">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Linq">
-          <HintPath>..\..\packages\Rx-Linq\lib\net45\System.Reactive.Linq.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="$(TargetFrameworkIdentifier) == 'Silverlight' And $(TargetFrameworkVersion) == 'v5.0'">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Linq">
-          <HintPath>..\..\packages\Rx-Linq\lib\sl5\System.Reactive.Linq.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="$(TargetFrameworkIdentifier) == 'WindowsPhone' And $(TargetFrameworkVersion) == 'v7.1'">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Linq">
-          <HintPath>..\..\packages\Rx-Linq\lib\windowsphone71\System.Reactive.Linq.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="$(TargetFrameworkIdentifier) == 'WindowsPhone' And ($(TargetFrameworkVersion) == 'v8.0' Or $(TargetFrameworkVersion) == 'v8.1')">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Linq">
-          <HintPath>..\..\packages\Rx-Linq\lib\windowsphone8\System.Reactive.Linq.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="($(TargetFrameworkIdentifier) == 'MonoAndroid') Or ($(TargetFrameworkIdentifier) == 'MonoTouch') Or ($(TargetFrameworkIdentifier) == 'Xamarin.iOS') Or ($(TargetFrameworkIdentifier) == 'Xamarin.Mac') Or ($(TargetFrameworkProfile) == 'Profile7') Or ($(TargetFrameworkProfile) == 'Profile31') Or ($(TargetFrameworkProfile) == 'Profile44') Or ($(TargetFrameworkProfile) == 'Profile49') Or ($(TargetFrameworkProfile) == 'Profile78')">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Linq">
-          <HintPath>..\..\packages\Rx-Linq\lib\portable-windows8+net45+wp8\System.Reactive.Linq.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="($(TargetFrameworkIdentifier) == 'WindowsPhoneApp') Or ($(TargetFrameworkProfile) == 'Profile32')">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Linq">
-          <HintPath>..\..\packages\Rx-Linq\lib\portable-win81+wpa81\System.Reactive.Linq.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="($(TargetFrameworkProfile) == 'Profile5') Or ($(TargetFrameworkProfile) == 'Profile6') Or ($(TargetFrameworkProfile) == 'Profile14') Or ($(TargetFrameworkProfile) == 'Profile19') Or ($(TargetFrameworkProfile) == 'Profile24') Or ($(TargetFrameworkProfile) == 'Profile37') Or ($(TargetFrameworkProfile) == 'Profile42') Or ($(TargetFrameworkProfile) == 'Profile47') Or ($(TargetFrameworkProfile) == 'Profile147') Or ($(TargetFrameworkProfile) == 'Profile158')">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Linq">
-          <HintPath>..\..\packages\Rx-Linq\lib\portable-net40+sl5+win8+wp8\System.Reactive.Linq.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="($(TargetFrameworkProfile) == 'Profile84') Or ($(TargetFrameworkProfile) == 'Profile111') Or ($(TargetFrameworkProfile) == 'Profile151') Or ($(TargetFrameworkProfile) == 'Profile157') Or ($(TargetFrameworkProfile) == 'Profile259')">
-      <ItemGroup>
-        <Reference Include="System.Reactive.Linq">
-          <HintPath>..\..\packages\Rx-Linq\lib\portable-net45+winrt45+wp8+wpa81\System.Reactive.Linq.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-  </Choose>
 </Project>
\ No newline at end of file
diff --git a/src/Paket.Core/PublicAPI.fs b/src/Paket.Core/PublicAPI.fs
index fa1e408662..032fd35856 100644
--- a/src/Paket.Core/PublicAPI.fs
+++ b/src/Paket.Core/PublicAPI.fs
@@ -7,7 +7,6 @@ open Paket.PackageSources
 open System
 open System.IO
 open Chessie.ErrorHandling
-open FSharp.Control.Reactive
 
 /// Paket API which is optimized for F# Interactive use.
 type Dependencies(dependenciesFileName: string) =
@@ -457,7 +456,7 @@ type Dependencies(dependenciesFileName: string) =
         |> Seq.map (fun url ->
                     NuGetV3.FindPackages(None, url, searchTerm, maxResults)
                     |> Observable.ofAsyncWithToken cancellationToken)
-        |> Observable.mergeSeq
+        |> Seq.reduce Observable.merge
         |> Observable.flatten
         |> Observable.distinct
 
diff --git a/src/Paket.Core/Utils.fs b/src/Paket.Core/Utils.fs
index 56b4ab6a1a..58d9700fe1 100644
--- a/src/Paket.Core/Utils.fs
+++ b/src/Paket.Core/Utils.fs
@@ -7,7 +7,6 @@ open System.IO
 open System.Net
 open System.Xml
 open System.Text
-open FSharp.Control.Reactive
 open Paket
 open Paket.Logging
 open Chessie.ErrorHandling
@@ -517,10 +516,25 @@ module ObservableExtensions =
                       { new IDisposable with
                             member __.Dispose() = () } }
 
-        let flatten (a: IObservable<#seq<'a>>): IObservable<'a> =
-            a
-            |> Observable.map Observable.ofSeq
-            |> Observable.mergeInner
+        let flatten (input: IObservable<#seq<'a>>): IObservable<'a> =
+            { new IObservable<'a> with
+                member __.Subscribe obs =
+                    let cts = new CancellationTokenSource()
+                    let sub = 
+                        input.Subscribe
+                          ({ new IObserver<#seq<'a>> with
+                              member x.OnNext(values) = values |> Seq.iter obs.OnNext
+                              member x.OnCompleted() = 
+                                cts.Cancel()
+                                obs.OnCompleted()
+                              member x.OnError(e) = 
+                                cts.Cancel()
+                                obs.OnError(e) })
+
+                    { new IDisposable with 
+                        member __.Dispose() = 
+                            sub.Dispose()
+                            cts.Cancel() }}
 
         let distinct (a: IObservable<'a>): IObservable<'a> =
             let seen = HashSet()
diff --git a/src/Paket.Core/paket.references b/src/Paket.Core/paket.references
index 7368c23028..dd0e9b3b77 100644
--- a/src/Paket.Core/paket.references
+++ b/src/Paket.Core/paket.references
@@ -1,6 +1,5 @@
 Newtonsoft.Json
 FSharp.Core
-FSharp.Control.Reactive
 Chessie
 File:Globbing.fs .
 File:AssemblyReader.fs .
\ No newline at end of file