diff --git a/src/Snap.Shared.Tests/Snap.Shared.Tests.csproj b/src/Snap.Shared.Tests/Snap.Shared.Tests.csproj
index f79c133d..a0794c6f 100644
--- a/src/Snap.Shared.Tests/Snap.Shared.Tests.csproj
+++ b/src/Snap.Shared.Tests/Snap.Shared.Tests.csproj
@@ -6,7 +6,7 @@
         <IsPackable>false</IsPackable>
         <IsTestProject>false</IsTestProject>
         <TargetFrameworks Condition="$(OsPlatform) == 'Windows'">netcoreapp2.1;net461</TargetFrameworks>
-        <TargetFrameworks Condition="$(OsPlatform) != 'Windows'">netcoreapp3.1</TargetFrameworks>
+        <TargetFrameworks Condition="$(OsPlatform) != 'Windows'">netcoreapp2.1</TargetFrameworks>
     </PropertyGroup>
 
     <ItemGroup>
@@ -17,7 +17,7 @@
         <PackageReference Include="XunitXml.TestLogger" Version="2.1.26" />
     </ItemGroup>
 
-    <ItemGroup Condition="'$(IsNetFullFramework)' == 'true'">
+    <ItemGroup Condition="$(IsNetFullFramework) == 'true'">
         <PackageReference Include="System.Runtime.InteropServices.RuntimeInformation" Version="4.3.0">
             <PrivateAssets>all</PrivateAssets>
         </PackageReference>
diff --git a/src/Snap.Tests/Snap.Tests.csproj b/src/Snap.Tests/Snap.Tests.csproj
index c9bd2b2c..69937a24 100644
--- a/src/Snap.Tests/Snap.Tests.csproj
+++ b/src/Snap.Tests/Snap.Tests.csproj
@@ -6,7 +6,7 @@
         <IsPackable>false</IsPackable>
         <IsTestProject>true</IsTestProject>
         <TargetFrameworks Condition="$(OsPlatform) == 'Windows'">netcoreapp2.1;net461</TargetFrameworks>
-        <TargetFrameworks Condition="$(OsPlatform) != 'Windows'">netcoreapp3.1</TargetFrameworks>
+        <TargetFrameworks Condition="$(OsPlatform) != 'Windows'">netcoreapp2.1;netstandard2.0</TargetFrameworks>
     </PropertyGroup>
 
     <ItemGroup>
@@ -31,7 +31,7 @@
         </PackageReference>
     </ItemGroup>
 
-    <ItemGroup Condition="'$(IsNetFullFramework)' == 'true'">
+    <ItemGroup Condition="$(IsNetFullFramework) == 'true'">
         <PackageReference Include="System.Runtime.InteropServices.RuntimeInformation" Version="4.3.0">
             <PrivateAssets>all</PrivateAssets>
         </PackageReference>
diff --git a/src/Snap/Core/NetFullFrameworkShimExtensions.cs b/src/Snap/Core/ShimExtensions.cs
similarity index 94%
rename from src/Snap/Core/NetFullFrameworkShimExtensions.cs
rename to src/Snap/Core/ShimExtensions.cs
index 45530314..431a9e9c 100644
--- a/src/Snap/Core/NetFullFrameworkShimExtensions.cs
+++ b/src/Snap/Core/ShimExtensions.cs
@@ -1,11 +1,11 @@
-#if NETFULLFRAMEWORK
+#if NETFULLFRAMEWORK || NETSTANDARD
 using System.Collections.Generic;
 using JetBrains.Annotations;
 
 // ReSharper disable once CheckNamespace
 namespace System.Linq
 {
-    internal static class NetFullFrameworkShimExtensions
+    internal static class ShimExtensions
     {
         public static IEnumerable<TSource> SkipLast<TSource>([NotNull] this IEnumerable<TSource> source)
         {
diff --git a/src/Snap/Core/SnapBinaryPatcher.cs b/src/Snap/Core/SnapBinaryPatcher.cs
index 26b52360..3ef3e517 100644
--- a/src/Snap/Core/SnapBinaryPatcher.cs
+++ b/src/Snap/Core/SnapBinaryPatcher.cs
@@ -1,9 +1,11 @@
 // Resharper disable all
 using System;
 using System.IO;
+using System.IO.Compression;
 using System.Threading;
 using SharpCompress.Compressors;
 using SharpCompress.Compressors.BZip2;
+using CompressionMode = SharpCompress.Compressors.CompressionMode;
 
 // Adapted from https://github.com/LogosBible/bsdiff.net/blob/master/src/bsdiff/BinaryPatchUtility.cs
 // Adapter from https://raw.githubusercontent.com/Squirrel/Squirrel.Windows/afe47c9c064bf9860404c61d6ef36d8ecb250b04/src/Squirrel/BinaryPatchUtility.cs
@@ -925,4 +927,4 @@ public static void ReadExactly(this Stream stream, byte[] buffer, int offset, in
         }
     }
 }
-// Resharper enable all
\ No newline at end of file
+// Resharper enable all
diff --git a/src/Snap/CoreRunLib.cs b/src/Snap/CoreRunLib.cs
index e3bd3552..48077eb1 100644
--- a/src/Snap/CoreRunLib.cs
+++ b/src/Snap/CoreRunLib.cs
@@ -111,7 +111,7 @@ public bool Chmod([JetBrains.Annotations.NotNull] string filename, int mode)
         {
             if (filename == null) throw new ArgumentNullException(nameof(filename));
             pal_fs_chmod.ThrowIfDangling();
-            #if !NETFULLFRAMEWORK
+            #if NETCOREAPP
             return pal_fs_chmod.Invoke(filename, mode) == 1;
             #endif
             var filenameUtf8 = Utf16ToUtf8(filename);
@@ -137,7 +137,7 @@ public bool SetIcon([JetBrains.Annotations.NotNull] string exeAbsolutePath, [Jet
             {
                 throw new FileNotFoundException(iconAbsolutePath);
             }
-            #if !NETFULLFRAMEWORK
+            #if NETCOREAPP
             return pal_set_icon.Invoke(exeAbsolutePath, iconAbsolutePath) == 1;
             #endif
             var exeAbsolutePathUtf8 = Utf16ToUtf8(exeAbsolutePath);
diff --git a/src/Snap/Snap.csproj b/src/Snap/Snap.csproj
index 28df5ccd..9914bea4 100644
--- a/src/Snap/Snap.csproj
+++ b/src/Snap/Snap.csproj
@@ -8,8 +8,8 @@
         <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
         <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>
         <IAmSnapCore>true</IAmSnapCore>
-        <TargetFrameworks Condition="$(OsPlatform) == 'Windows'">netcoreapp2.1;net461</TargetFrameworks>
-        <TargetFrameworks Condition="$(OsPlatform) != 'Windows'">netcoreapp3.1</TargetFrameworks>
+        <TargetFrameworks Condition="$(OsPlatform) == 'Windows'">netcoreapp2.1;netstandard2.0;net461</TargetFrameworks>
+        <TargetFrameworks Condition="$(OsPlatform) != 'Windows'">netcorapp2.1;netstandard2.0</TargetFrameworks>
         <IsPackable>true</IsPackable>
         <IsTestProject>false</IsTestProject>
     </PropertyGroup>
diff --git a/src/Snapx.Tests/Snapx.Tests.csproj b/src/Snapx.Tests/Snapx.Tests.csproj
index 27c13438..93ee18e0 100644
--- a/src/Snapx.Tests/Snapx.Tests.csproj
+++ b/src/Snapx.Tests/Snapx.Tests.csproj
@@ -30,7 +30,7 @@
         </PackageReference>
     </ItemGroup>
 
-    <ItemGroup Condition="'$(IsNetFullFramework)' == 'true'">
+    <ItemGroup Condition="$(IsNetFullFramework) == 'true'">
         <PackageReference Include="System.Runtime.InteropServices.RuntimeInformation" Version="4.3.0">
             <PrivateAssets>all</PrivateAssets>
         </PackageReference>