Working example project file for .NET Core + F# + SQLProvider + Postgres

PostgresSqlProvider.fsproj

<?xml version="1.0" encoding="utf-8"?>
<Project>
  <PropertyGroup>
    <FscToolPath>$(HOME)/.nix-profile/bin</FscToolPath>
    <FscToolExe>fsharpc</FscToolExe>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="FSharp.Data.SqlProvider">
      <HintPath>$(HOME)/.nuget/packages/sqlprovider/1.1.55/lib/net451/FSharp.Data.SqlProvider.dll</HintPath>
   </Reference>
 </ItemGroup>
 <Target Name="CopyLibs">
    <Exec Command="mkdir -p bin/libs" />
    <Exec Command="cp $(HOME)/.nuget/packages/npgsql/4.0.4/lib/netstandard2.0/Npgsql.dll bin/libs" />
    <Exec Command="cp $(HOME)/.nuget/packages/system.threading.tasks.extensions/4.5.1/lib/netstandard2.0/System.Thread>
    <Exec Command="cp $(HOME)/.nuget/packages/system.runtime.compilerservices.unsafe/4.5.2/lib/netstandard2.0/System.R>
 </Target>
 <Target Name="PreBuild" BeforeTargets="PreBuildEvent">
   <CallTarget Targets="CopyLibs"/>
 </Target>
</Project>