Building fails due to missing fsc.exe

Description

Missing Paket/src/Paket.Core/../tools/fsc.exe

OS - Ubuntu 18.04

Repro steps

1. run ./build.sh

Should build. Fails to do so because of missing file.

Cmd line output

Paket version 5.223.0
The last restore is still up to date. Nothing left to do.
Performance:

• Runtime: 64 milliseconds
  Building project with version: LocalBuild
  Shortened DependencyGraph for Target All:
  <== All
  <== DotnetTest
  <== RunTests
  <== Build
  <== Clean
  <== AssemblyInfo
  <== BuildCore
  <== DotnetBuild
  <== DotnetRestore
  <== InstallDotNetCore

The running order is:

• Clean
• AssemblyInfo
• Build
• InstallDotNetCore
• DotnetRestore
• DotnetBuild
• BuildCore
• RunTests
• DotnetTest
• All
  Running build with 1 worker
  Starting Target: Clean
  Deleting contents of /home/richard/projects/Paket/bin
  Finished Target: Clean
  Starting Target: AssemblyInfo (==> Clean)
  Created AssemblyInfo file "src/Paket/AssemblyInfo.fs".
  Created AssemblyInfo file "src/Paket.Core/AssemblyInfo.fs".
  Created AssemblyInfo file "/home/richard/projects/Paket/src/Paket.Bootstrapper/Properties/AssemblyInfo.cs".
  Finished Target: AssemblyInfo
  Starting Target: Build (==> Clean, AssemblyInfo)
  Building project: /home/richard/projects/Paket/Paket.sln
  /usr/bin/xbuild /home/richard/projects/Paket/Paket.sln /t:Rebuild /p:RestorePackages="False" /p:Configuration="Release" /p:VisualStudioVersion="14.0" /p:ToolsVersion="14.0" /logger:Fake.MsBuildLogger+ErrorLogger,"/home/richard/projects/Paket/packages/build/FAKE/tools/FakeLib.dll"
  XBuild Engine Version 14.0
  Mono, Version 4.6.2.0
  Copyright (C) 2005-2013 Various Mono authors

Build started 02/10/2019 11:30:53.

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/home/richard/projects/Paket/tests/Paket.Bootstrapper.Tests/Paket.Bootstrapper.Tests.csproj: warning : Could not find project file //.paket/paket.targets, to import. Ignoring.
/home/richard/projects/Paket/Paket.sln: warning : Don't know how to handle GlobalSection ExtensibilityGlobals, Ignoring.
/home/richard/projects/Paket/Paket.sln: warning : Don't know how to handle GlobalSection Performance, Ignoring.
/home/richard/projects/Paket/Paket.sln: warning : Don't know how to handle GlobalSection Performance, Ignoring.
/home/richard/projects/Paket/Paket.sln: warning : Don't know how to handle GlobalSection Performance, Ignoring.
/home/richard/projects/Paket/Paket.sln: warning : Don't know how to handle GlobalSection Performance, Ignoring.
Project "/home/richard/projects/Paket/Paket.sln" (Rebuild target(s)):
Target ValidateSolutionConfiguration:
Building solution configuration "Release|Any CPU".
Target Rebuild:
Project "/home/richard/projects/Paket/src/Paket.Bootstrapper/Paket.Bootstrapper.csproj" (Rebuild target(s)):
Target CoreClean:
Deleting file '/home/richard/projects/Paket/src/Paket.Bootstrapper/obj/Release/.NETFramework,Version=v4.5.AssemblyAttribute.cs'
Deleting file '/home/richard/projects/Paket/src/Paket.Bootstrapper/obj/Release/paket.bootstrapper.exe'
Deleting file '/home/richard/projects/Paket/src/Paket.Bootstrapper/obj/Release/paket.bootstrapper.exe.mdb'
Deleting file '/home/richard/projects/Paket/src/Paket.Bootstrapper/obj/Release/Paket.Bootstrapper.csproj.FilesWrittenAbsolute.txt'
Target PrepareForBuild:
Configuration: Release Platform: AnyCPU
Target GenerateSatelliteAssemblies:
No input files were specified for target GenerateSatelliteAssemblies, skipping.
Target CoreCompile:
Tool /usr/lib/mono/4.5/mcs.exe execution started with arguments: /noconfig /debug:pdbonly /optimize+ /out:obj/Release/paket.bootstrapper.exe ArgumentParser.cs BootstrapperHelper.cs BootstrapperOptions.cs DownloadStrategies/IDownloadStrategy.cs DownloadStrategies/IHaveEffectiveStrategy.cs InstallKind/InstallAsTool.cs PaketHashFile.cs Properties/InternalsVisibleTo.cs PaketDependencies.cs PaketRunner.cs Verbosity.cs WindowsProcessArguments.cs DownloadStrategies/CacheDownloadStrategy.cs HelperProxies/IWebRequestProxy.cs HelperProxies/WebRequestProxy.cs DownloadArguments.cs EnvProxy.cs HelperProxies/FileSystemProxy.cs DownloadStrategies/GitHubDownloadStrategy.cs DownloadStrategies/DownloadStrategy.cs HelperProxies/IFileSystemProxy.cs DownloadStrategies/NugetDownloadStrategy.cs ConsoleImpl.cs Program.cs Properties/AssemblyInfo.cs SemVer.cs DownloadStrategies/TemporarilyIgnoreUpdatesDownloadStrategy.cs HelperProxies/DateTimeProxy.cs obj/Release/.NETFramework,Version=v4.5.AssemblyAttribute.cs /target:exe /unsafe- /define:TRACE /nostdlib /platform:AnyCPU /reference:/usr/lib/mono/4.5/System.dll /reference:/usr/lib/mono/4.5/System.Configuration.dll /reference:/usr/lib/mono/4.5/System.Data.dll /reference:/usr/lib/mono/4.5/System.IO.Compression.FileSystem.dll /reference:/usr/lib/mono/4.5/System.Xml.dll /reference:/usr/lib/mono/4.5/System.Xml.Linq.dll /reference:/usr/lib/mono/4.5/System.Core.dll /reference:/usr/lib/mono/4.5//mscorlib.dll /warn:4
Program.cs(42,21): warning CS0219: The variable `exeInWorkingDir' is assigned but its value is never used
Target DeployOutputFiles:
Copying file from '/home/richard/projects/Paket/src/Paket.Bootstrapper/obj/Release/paket.bootstrapper.exe.mdb' to '/home/richard/projects/Paket/bin/paket.bootstrapper.exe.mdb'
Copying file from '/home/richard/projects/Paket/src/Paket.Bootstrapper/obj/Release/paket.bootstrapper.exe' to '/home/richard/projects/Paket/bin/paket.bootstrapper.exe'
Done building project "/home/richard/projects/Paket/src/Paket.Bootstrapper/Paket.Bootstrapper.csproj".
Project "/home/richard/projects/Paket/src/Paket.Core/Paket.Core.fsproj" (Rebuild target(s)):
Target CoreClean:
Deleting file '/home/richard/projects/Paket/src/Paket.Core/obj/Release/.NETFramework,Version=v4.5.AssemblyAttribute.fs'
Deleting file '/home/richard/projects/Paket/src/Paket.Core/obj/Release/Paket.Restore.targets'
Deleting file '/home/richard/projects/Paket/src/Paket.Core/obj/Release/Paket.Core.fsproj.FilesWrittenAbsolute.txt'
Target PrepareForBuild:
Configuration: Release Platform: AnyCPU
Target CopyFilesMarkedCopyLocal:
Copying file from '/home/richard/projects/Paket/packages/Chessie/lib/net40/Chessie.dll' to '/home/richard/projects/Paket/bin/Chessie.dll'
Copying file from '/home/richard/projects/Paket/packages/FSharp.Core/lib/net45/FSharp.Core.dll' to '/home/richard/projects/Paket/bin/FSharp.Core.dll'
Copying file from '/home/richard/projects/Paket/packages/Mono.Cecil/lib/net40/Mono.Cecil.dll' to '/home/richard/projects/Paket/bin/Mono.Cecil.dll'
Copying file from '/home/richard/projects/Paket/packages/Mono.Cecil/lib/net40/Mono.Cecil.Mdb.dll' to '/home/richard/projects/Paket/bin/Mono.Cecil.Mdb.dll'
Copying file from '/home/richard/projects/Paket/packages/Mono.Cecil/lib/net40/Mono.Cecil.Pdb.dll' to '/home/richard/projects/Paket/bin/Mono.Cecil.Pdb.dll'
Copying file from '/home/richard/projects/Paket/packages/Mono.Cecil/lib/net40/Mono.Cecil.Rocks.dll' to '/home/richard/projects/Paket/bin/Mono.Cecil.Rocks.dll'
Copying file from '/home/richard/projects/Paket/packages/Newtonsoft.Json/lib/net45/Newtonsoft.Json.dll' to '/home/richard/projects/Paket/bin/Newtonsoft.Json.dll'
Copying file from '/home/richard/projects/Paket/packages/System.Runtime.InteropServices.RuntimeInformation/lib/net45/System.Runtime.InteropServices.RuntimeInformation.dll' to '/home/richard/projects/Paket/bin/System.Runtime.InteropServices.RuntimeInformation.dll'
Target CopyNonResxEmbeddedResources:
Copying file from '/home/richard/projects/Paket/src/Paket.Core/embedded/Paket.Restore.targets' to '/home/richard/projects/Paket/src/Paket.Core/obj/Release/Paket.Restore.targets'
Target GenerateSatelliteAssemblies:
No input files were specified for target GenerateSatelliteAssemblies, skipping.
Target CoreCompile:
/home/richard/projects/Paket/packages/FSharp.Compiler.Tools/tools/Microsoft.FSharp.Targets: error : Tool executable '/home/richard/projects/Paket/src/Paket.Core/../tools/fsc.exe' could not be found
Task "Fsc" execution -- FAILED
Done building target "CoreCompile" in project "/home/richard/projects/Paket/src/Paket.Core/Paket.Core.fsproj".-- FAILED
Done building project "/home/richard/projects/Paket/src/Paket.Core/Paket.Core.fsproj".-- FAILED
Task "MSBuild" execution -- FAILED
Done building target "Rebuild" in project "/home/richard/projects/Paket/Paket.sln".-- FAILED
Done building project "/home/richard/projects/Paket/Paket.sln".-- FAILED

Build FAILED.

Warnings:

/home/richard/projects/Paket/tests/Paket.Bootstrapper.Tests/Paket.Bootstrapper.Tests.csproj: warning : Could not find project file //.paket/paket.targets, to import. Ignoring.
/home/richard/projects/Paket/Paket.sln: warning : Don't know how to handle GlobalSection ExtensibilityGlobals, Ignoring.
/home/richard/projects/Paket/Paket.sln: warning : Don't know how to handle GlobalSection Performance, Ignoring.
/home/richard/projects/Paket/Paket.sln: warning : Don't know how to handle GlobalSection Performance, Ignoring.
/home/richard/projects/Paket/Paket.sln: warning : Don't know how to handle GlobalSection Performance, Ignoring.
/home/richard/projects/Paket/Paket.sln: warning : Don't know how to handle GlobalSection Performance, Ignoring.

/home/richard/projects/Paket/Paket.sln (Rebuild) ->
(Rebuild target) ->
/home/richard/projects/Paket/src/Paket.Bootstrapper/Paket.Bootstrapper.csproj (Rebuild) ->
/usr/lib/mono/xbuild/14.0/bin/Microsoft.CSharp.targets (CoreCompile target) ->

Program.cs(42,21): warning CS0219: The variable `exeInWorkingDir' is assigned but its value is never used

Errors:

/home/richard/projects/Paket/Paket.sln (Rebuild) ->
(Rebuild target) ->
/home/richard/projects/Paket/src/Paket.Core/Paket.Core.fsproj (Rebuild) ->
/home/richard/projects/Paket/packages/FSharp.Compiler.Tools/tools/Microsoft.FSharp.Targets (CoreCompile target) ->

/home/richard/projects/Paket/packages/FSharp.Compiler.Tools/tools/Microsoft.FSharp.Targets: error : Tool executable '/home/richard/projects/Paket/src/Paket.Core/../tools/fsc.exe' could not be found

 7 Warning(s)
 1 Error(s)

Time Elapsed 00:00:00.7752950
Running build failed.
Error:
Building /home/richard/projects/Paket/Paket.sln failed with exitcode 1.

---

Build Time Report

Target Duration

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Clean 00:00:00.2944593
AssemblyInfo 00:00:00.0202190
Build Failure
Total: 00:00:01.6619180

Status: Failure

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1. Building /home/richard/projects/Paket/Paket.sln failed with exitcode 1.
2. : /home/richard/projects/Paket/packages/FSharp.Compiler.Tools/tools/Microsoft.FSharp.Targets(0,0): Tool executable '/home/richard/projects/Paket/src/Paket.Core/../tools/fsc.exe' could not be found

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Start with ./build.sh and inspect src/Paket.Core/Paket.Core.fsproj alongside packages/FSharp.Compiler.Tools/tools/Microsoft.FSharp.Targets, which reports the missing ../tools/fsc.exe. Reproduce the failure on the stated Ubuntu setup, then verify that the build completes successfully without the missing compiler executable error.