Attempting to build msbuild results in the below results: ===> Patching for msbuild-15.8.p ===> Applying FreeBSD patches for msbuild-15.8.p ===> msbuild-15.8.p depends on executable: bash - found ===> msbuild-15.8.p depends on executable: python - found ===> msbuild-15.8.p depends on executable: mono - found ===> Configuring for msbuild-15.8.p ===> Building for msbuild-15.8.p (cd /usr/ports/devel/msbuild/work/msbuild-0.06; /usr/bin/env GIT_COMMIT=3c930fa8721935cf0e381fd349f6f50cf2bc223d MONO_SHARED_DIR="/usr/ports/devel/msbuild/work" TZ=UTC NUGET_PACKAGES=/usr/ports/devel/msbuild/work/msbuild-0.06/packages XDG_DATA_HOME=/usr/ports/devel/msbuild/work XDG_CONFIG_HOME=/usr/ports/devel/msbuild/work HOME=/usr/ports/devel/msbuild/work PATH=/usr/ports/devel/msbuild/work/.bin:/root/.opam/system/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin:/usr/local/opt/bin:/root/bin:/usr/local/qb2c:/usr/local/gobo/bin:/usr/local/SmartEiffel/bin:/usr/local/p5x NO_PIE=yes MK_DEBUG_FILES=no MK_KERNEL_SYMBOLS=no SHELL=/bin/sh NO_LINT=YES PREFIX=/usr/local LOCALBASE=/usr/local LIBDIR="/usr/lib" CC="gcc7" CFLAGS="-O2 -pipe -fno-strict-aliasing" CPP="cpp7" CPPFLAGS="" LDFLAGS="" LIBS="" CXX="g++7" CXXFLAGS="-O2 -pipe -fno-strict-aliasing " MANPREFIX="/usr/local" BSD_INSTALL_PROGRAM="install -s -m 555" BSD_INSTALL_LIB="install -s -m 0644" BSD_INSTALL_SCRIPT="install -m 555" BSD_INSTALL_DATA="install -m 0644" BSD_INSTALL_MAN="install -m 444" ./build/build.sh -host mono -configuration Release -skipTests build) ============= MSBuild command ============= /usr/ports/devel/msbuild/work/msbuild-0.06/build/../artifacts/mono-msbuild/msbuild "/usr/ports/devel/msbuild/work/msbuild-0.06/build/Toolset.proj" /t:restore /m /clp:Summary /warnaserror /v:minimal /bl:"/usr/ports/devel/msbuild/work/msbuild-0.06/build/../artifacts/Release-MONO/log/Toolset.binlog" =========================================== Microsoft (R) Build Engine version 15.8.38.37692 (xplat-master/3c930fa8 Tue May 8 12:36:23 EDT 2018) for Mono Copyright (C) Microsoft Corporation. All rights reserved. Some command line switches were read from the auto-response file "MSBuild.rsp". To disable this file, use the "/noautoresponse" switch. /usr/ports/devel/msbuild/work/msbuild-0.06/artifacts/mono-msbuild/MSBuild.dll /bl:/usr/ports/devel/msbuild/work/msbuild-0.06/build/../artifacts/Release-MONO/log/Toolset.binlog /clp:Summary /m /p:MSBuildExtensionsPath=/usr/ports/devel/msbuild/work/msbuild-0.06/artifacts/mono-msbuild/Extensions /t:restore /v:minimal /warnaserror /usr/ports/devel/msbuild/work/msbuild-0.06/build/Toolset.proj Build started 12/05/2018 17:49:18. /usr/ports/devel/msbuild/work/msbuild-0.06/artifacts/mono-msbuild/Sdks/Microsoft.NET.Sdk/Sdk/Sdk.props(29,3): error MSB4102: The value "//Microsoft.Common.props" of the "Project" attribute in element <Import> is invalid. UNC paths should be of the form \\server\share. [/usr/ports/devel/msbuild/work/msbuild-0.06/build/Toolset.proj] Build FAILED. /usr/ports/devel/msbuild/work/msbuild-0.06/artifacts/mono-msbuild/Sdks/Microsoft.NET.Sdk/Sdk/Sdk.props(29,3): error MSB4102: The value "//Microsoft.Common.props" of the "Project" attribute in element <Import> is invalid. UNC paths should be of the form \\server\share. [/usr/ports/devel/msbuild/work/msbuild-0.06/build/Toolset.proj] Time Elapsed 00:00:01.23 Failed to run MSBuild: /usr/ports/devel/msbuild/work/msbuild-0.06/build/../artifacts/mono-msbuild/msbuild "/usr/ports/devel/msbuild/work/msbuild-0.06/build/Toolset.proj" /t:restore /m /clp:Summary /warnaserror /v:minimal /bl:"/usr/ports/devel/msbuild/work/msbuild-0.06/build/../artifacts/Release-MONO/log/Toolset.binlog" *** Error code 1 The file "Microsoft.Common.props" exists as part of the mono-msbuild-v15.8-preview-0.06_GH0.tar.gz. However "MSBuildExtensionsPath" and "MSBuildToolsVersion" are not being defined.