diff --git a/build.psm1 b/build.psm1
index 0d87ac13b1..de75b1c15c 100644
--- a/build.psm1
+++ b/build.psm1
@@ -160,14 +160,6 @@ if ( $env:PSModulePath -notcontains $TestModulePath ) {
     $env:PSModulePath = $TestModulePath+$TestModulePathSeparator+$($env:PSModulePath)
 }
 
-#
-# At the moment, we just support x64 builds. When we support x86 builds, this
-# check may need to verify the SDK for the specified architecture.
-#
-function Get-Win10SDKBinDir {
-    return "${env:ProgramFiles(x86)}\Windows Kits\10\bin\x64"
-}
-
 function Test-Win10SDK {
     # The Windows 10 SDK is installed to "${env:ProgramFiles(x86)}\Windows Kits\10\bin\x64",
     # but the directory may exist even if the SDK has not been installed.
@@ -290,18 +282,10 @@ function Start-PSBuild {
 
         # These runtimes must match those in project.json
         # We do not use ValidateScript since we want tab completion
-        [ValidateSet("ubuntu.14.04-x64",
-                     "ubuntu.16.04-x64",
-                     "debian.8-x64",
-                     "centos.7-x64",
-                     "fedora.24-x64",
-                     "win7-x64",
+        [ValidateSet("win7-x64",
                      "win7-x86",
-                     "win81-x64",
-                     "win10-x64",
                      "osx.10.12-x64",
-                     "opensuse.13.2-x64",
-                     "opensuse.42.1-x64",
+                     "linux-x64",
                      "linux-arm")]
         [string]$Runtime,
 
@@ -589,18 +573,10 @@ function New-PSOptions {
         # These are duplicated from Start-PSBuild
         # We do not use ValidateScript since we want tab completion
         [ValidateSet("",
-                     "ubuntu.14.04-x64",
-                     "ubuntu.16.04-x64",
-                     "debian.8-x64",
-                     "centos.7-x64",
-                     "fedora.24-x64",
                      "win7-x86",
                      "win7-x64",
-                     "win81-x64",
-                     "win10-x64",
                      "osx.10.12-x64",
-                     "opensuse.13.2-x64",
-                     "opensuse.42.1-x64",
+                     "linux-x64",
                      "linux-arm")]
         [string]$Runtime,
 
@@ -659,17 +635,23 @@ function New-PSOptions {
     }
 
     if (-not $Runtime) {
-        $Runtime = dotnet --info | ForEach-Object {
-            if ($_ -match "RID") {
-                $_ -split "\s+" | Select-Object -Last 1
+        if ($Environment.IsLinux) {
+            $Runtime = "linux-x64"
+        } else {
+            $RID = dotnet --info | ForEach-Object {
+                if ($_ -match "RID") {
+                    $_ -split "\s+" | Select-Object -Last 1
+                }
             }
-        }
 
-        # We plan to release packages targetting win7-x64 and win7-x86 RIDs,
-        # which supports all supported windows platforms.
-        # So we, will change the RID to win7-<arch>
-        if ($Environment.IsWindows) {
-            $Runtime = $Runtime -replace "win\d+", "win7"
+            if ($Environment.IsWindows) {
+                # We plan to release packages targetting win7-x64 and win7-x86 RIDs,
+                # which supports all supported windows platforms.
+                # So we, will change the RID to win7-<arch>
+                $Runtime = $RID -replace "win\d+", "win7"
+            } else {
+                $Runtime = $RID
+            }
         }
 
         if (-not $Runtime) {
@@ -851,7 +833,7 @@ function Start-PSPester {
     {
         $Path += "$PSScriptRoot/tools/failingTests"
     }
-    
+
     # we need to do few checks and if user didn't provide $ExcludeTag explicitly, we should alternate the default
     if ($Unelevate)
     {
@@ -1869,18 +1851,10 @@ function Start-CrossGen {
         $PublishPath,
 
         [Parameter(Mandatory=$true)]
-        [ValidateSet("ubuntu.14.04-x64",
-                     "ubuntu.16.04-x64",
-                     "debian.8-x64",
-                     "centos.7-x64",
-                     "fedora.24-x64",
-                     "win7-x86",
+        [ValidateSet("win7-x86",
                      "win7-x64",
-                     "win81-x64",
-                     "win10-x64",
                      "osx.10.12-x64",
-                     "opensuse.13.2-x64",
-                     "opensuse.42.1-x64",
+                     "linux-x64",
                      "linux-arm")]
         [string]
         $Runtime
diff --git a/src/ResGen/ResGen.csproj b/src/ResGen/ResGen.csproj
index b06fd0d181..87315226e6 100644
--- a/src/ResGen/ResGen.csproj
+++ b/src/ResGen/ResGen.csproj
@@ -5,7 +5,7 @@
     <TargetFramework>netcoreapp2.0</TargetFramework>
     <AssemblyName>resgen</AssemblyName>
     <OutputType>Exe</OutputType>
-    <RuntimeIdentifiers>ubuntu.16.10-x64;ubuntu.16.04-x64;ubuntu.14.04-x64;debian.8-x64;centos.7-x64;fedora.24-x64;win7-x86;win7-x64;win81-x64;win10-x64;osx.10.12-x64;opensuse.13.2-x64;opensuse.42.1-x64</RuntimeIdentifiers>
+    <RuntimeIdentifiers>win7-x86;win7-x64;osx.10.12-x64;linux-x64</RuntimeIdentifiers>
   </PropertyGroup>
 
 </Project>
diff --git a/src/TypeCatalogGen/TypeCatalogGen.csproj b/src/TypeCatalogGen/TypeCatalogGen.csproj
index 7ab1404d63..64d69352ed 100644
--- a/src/TypeCatalogGen/TypeCatalogGen.csproj
+++ b/src/TypeCatalogGen/TypeCatalogGen.csproj
@@ -5,7 +5,7 @@
     <TargetFramework>netcoreapp2.0</TargetFramework>
     <AssemblyName>TypeCatalogGen</AssemblyName>
     <OutputType>Exe</OutputType>
-    <RuntimeIdentifiers>ubuntu.14.04-x64;ubuntu.16.04-x64;ubuntu.16.10-x64;debian.8-x64;centos.7-x64;fedora.24-x64;win7-x86;win7-x64;win81-x64;win10-x64;osx.10.12-x64;opensuse.13.2-x64;opensuse.42.1-x64</RuntimeIdentifiers>
+    <RuntimeIdentifiers>win7-x86;win7-x64;osx.10.12-x64;linux-x64</RuntimeIdentifiers>
   </PropertyGroup>
 
   <PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
diff --git a/src/powershell-unix/powershell-unix.csproj b/src/powershell-unix/powershell-unix.csproj
index f3fae7671f..6bc16232a7 100644
--- a/src/powershell-unix/powershell-unix.csproj
+++ b/src/powershell-unix/powershell-unix.csproj
@@ -6,7 +6,7 @@
     <Description>PowerShell top-level project with .NET CLI host</Description>
     <AssemblyName>powershell</AssemblyName>
     <OutputType>Exe</OutputType>
-    <RuntimeIdentifiers>ubuntu.14.04-x64;ubuntu.16.04-x64;ubuntu.16.10-x64;debian.8-x64;centos.7-x64;fedora.24-x64;osx.10.12-x64;opensuse.13.2-x64;opensuse.42.1-x64</RuntimeIdentifiers>
+    <RuntimeIdentifiers>linux-x64;osx.10.12-x64;</RuntimeIdentifiers>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/powershell-win-core/powershell-win-core.csproj b/src/powershell-win-core/powershell-win-core.csproj
index de703c4c84..5c1fffe8c4 100644
--- a/src/powershell-win-core/powershell-win-core.csproj
+++ b/src/powershell-win-core/powershell-win-core.csproj
@@ -6,7 +6,7 @@
     <Description>PowerShell Core on Windows top-level project</Description>
     <AssemblyName>powershell</AssemblyName>
     <OutputType>Exe</OutputType>
-    <RuntimeIdentifiers>win7-x86;win7-x64;win81-x64;win10-x64</RuntimeIdentifiers>
+    <RuntimeIdentifiers>win7-x86;win7-x64</RuntimeIdentifiers>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/PSReadLine/PSReadLine.tests.csproj b/test/PSReadLine/PSReadLine.tests.csproj
index 329a964bda..b8e2dd0e2e 100644
--- a/test/PSReadLine/PSReadLine.tests.csproj
+++ b/test/PSReadLine/PSReadLine.tests.csproj
@@ -6,7 +6,7 @@
     <Description>PSReadLine basic tests</Description>
     <AssemblyName>TestPSReadLine</AssemblyName>
     <OutputType>Exe</OutputType>
-    <RuntimeIdentifiers>ubuntu.14.04-x64;ubuntu.16.04-x64;centos.7-x64;fedora.24-x64;win7-x86;win7-x64;win10-x64;osx.10.12-x64;opensuse.13.2-x64;opensuse.42.1-x64</RuntimeIdentifiers>
+    <RuntimeIdentifiers>win7-x86;win7-x64;osx.10.12-x64;linux-x64</RuntimeIdentifiers>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/csharp/csharp.tests.csproj b/test/csharp/csharp.tests.csproj
index 23da9190ef..03eb9cf93a 100644
--- a/test/csharp/csharp.tests.csproj
+++ b/test/csharp/csharp.tests.csproj
@@ -5,7 +5,7 @@
   <PropertyGroup>
     <Description>PowerShell On Linux xUnit Tests</Description>
     <AssemblyName>powershell-tests</AssemblyName>
-    <RuntimeIdentifiers>ubuntu.14.04-x64;ubuntu.16.04-x64;debian.8-x64;centos.7-x64;fedora.24-x64;win7-x86;win7-x64;win81-x64;win10-x64;osx.10.12-x64;opensuse.13.2-x64;opensuse.42.1-x64</RuntimeIdentifiers>
+    <RuntimeIdentifiers>win7-x86;win7-x64;osx.10.12-x64;linux-x64</RuntimeIdentifiers>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/tools/TestExe/TestExe.csproj b/test/tools/TestExe/TestExe.csproj
index 9cd9ac354f..f9c71f702c 100644
--- a/test/tools/TestExe/TestExe.csproj
+++ b/test/tools/TestExe/TestExe.csproj
@@ -5,7 +5,7 @@
     <TargetFramework>netcoreapp2.0</TargetFramework>
     <AssemblyName>testexe</AssemblyName>
     <OutputType>Exe</OutputType>
-    <RuntimeIdentifiers>ubuntu.16.04-x64;ubuntu.14.04-x64;debian.8-x64;centos.7-x64;fedora.24-x64;win7-x86;win7-x64;win81-x64;win10-x64;osx.10.12-x64;opensuse.13.2-x64;opensuse.42.1-x64</RuntimeIdentifiers>
+    <RuntimeIdentifiers>win7-x86;win7-x64;osx.10.12-x64;linux-x64</RuntimeIdentifiers>
   </PropertyGroup>
 
 </Project>