diff --git a/build/build.bat b/build/build.bat
index 7d4894cb4a..26cd3f5a36 100644
--- a/build/build.bat
+++ b/build/build.bat
@@ -1,2 +1,2 @@
 @ECHO OFF
-PowerShell -NoProfile -NoLogo -ExecutionPolicy unrestricted -Command "[System.Threading.Thread]::CurrentThread.CurrentCulture = ''; [System.Threading.Thread]::CurrentThread.CurrentUICulture = '';& '%~dp0build.ps1' %*; exit $LASTEXITCODE"
\ No newline at end of file
+pwsh -NoProfile -NoLogo -ExecutionPolicy unrestricted -Command "[System.Threading.Thread]::CurrentThread.CurrentCulture = ''; [System.Threading.Thread]::CurrentThread.CurrentUICulture = '';& '%~dp0build.ps1' %*; exit $LASTEXITCODE"
\ No newline at end of file
diff --git a/build/build.ps1 b/build/build.ps1
index 4277479dcb..c8eb331a20 100755
--- a/build/build.ps1
+++ b/build/build.ps1
@@ -1,25 +1,11 @@
 #!/usr/bin/env pwsh
 
+#Requires -PSEdition Core
+
 $DotNetInstallerUri = 'https://dot.net/v1/dotnet-install.ps1';
 $BuildPath = Split-Path $MyInvocation.MyCommand.Path -Parent
 $PSScriptRoot = Split-Path $PSScriptRoot -Parent
 
-if ($PSVersionTable.PSEdition -ne 'Core') {
-    # Attempt to set highest encryption available for SecurityProtocol.
-    # PowerShell will not set this by default (until maybe .NET 4.6.x). This
-    # will typically produce a message for PowerShell v2 (just an info
-    # message though)
-    try {
-        # Set TLS 1.2 (3072), then TLS 1.1 (768), then TLS 1.0 (192), finally SSL 3.0 (48)
-        # Use integers because the enumeration values for TLS 1.2 and TLS 1.1 won't
-        # exist in .NET 4.0, even though they are addressable if .NET 4.5+ is
-        # installed (.NET 4.5 is an in-place upgrade).
-        [System.Net.ServicePointManager]::SecurityProtocol = 3072 -bor 768 -bor 192 -bor 48
-      } catch {
-        Write-Output 'Unable to set PowerShell to use TLS 1.2 and TLS 1.1 due to old .NET Framework installed. If you see underlying connection closed or trust errors, you may need to upgrade to .NET Framework 4.5+ and PowerShell v3'
-      }
-}
-
 ###########################################################################
 # INSTALL .NET CORE CLI
 ###########################################################################
@@ -55,7 +41,9 @@ $GlobalJsonPath = Join-Path $SdkPath "global.json"
 if (!(Test-Path $InstallPath)) {
     New-Item -Path $InstallPath -ItemType Directory -Force | Out-Null;
     $ScriptPath = Join-Path $InstallPath 'dotnet-install.ps1'
-    (New-Object System.Net.WebClient).DownloadFile($DotNetInstallerUri, $ScriptPath);
+
+    curl -LsSfo $ScriptPath $DotNetInstallerUri --retry 5 --retry-delay 5
+
     & $ScriptPath -JSonFile $GlobalJsonPath -InstallDir $InstallPath;
 
     # Install .NET 8 SDK
diff --git a/build/build.sh b/build/build.sh
index 0a59db926c..8966f08139 100755
--- a/build/build.sh
+++ b/build/build.sh
@@ -13,7 +13,7 @@ export DOTNET_SYSTEM_NET_HTTP_USESOCKETSHTTPHANDLER=0
 
 if [ ! -d "$PROJECT_ROOT/.dotnet" ]; then
     mkdir "$PROJECT_ROOT/.dotnet"
-    curl -Lsfo "$PROJECT_ROOT/.dotnet/dotnet-install.sh" https://dot.net/v1/dotnet-install.sh
+    curl -LsSfo "$PROJECT_ROOT/.dotnet/dotnet-install.sh" https://dot.net/v1/dotnet-install.sh --retry 5 --retry-delay 5
     bash "$PROJECT_ROOT/.dotnet/dotnet-install.sh" --jsonfile ./build/sdk/global.json --install-dir .dotnet --no-path
 
     # Install .NET 8 SDK
diff --git a/docs/articles/contributing/building.md b/docs/articles/contributing/building.md
index 6288a84b07..8ee3b923b7 100644
--- a/docs/articles/contributing/building.md
+++ b/docs/articles/contributing/building.md
@@ -17,7 +17,7 @@ Once all the necessary tools are in place, building is trivial. Simply open solu
 The build currently depends on the following prerequisites:
 
 - Windows:
-  - PowerShell version 5 or higher
+  - PowerShell Core
   - MSBuild version 15.1 or higher
   - .NET Framework 4.6 or higher