?Hi, The build error is higher up in the output. What you are seeing is output of a parallel job. What happens when you run ninja again? Or capture the full build output and look through the file. Kent. ________________________________ From: Devel on behalf of hedi delpazir Sent: Tuesday, October 23, 2018 12:36 AM To: devel@sel4.systems Subject: [seL4] MCS tutorial Hi, After running ninja in build directory(following https://docs.sel4.systems/Tutorials/mcs.html) following error will occurred: [15 of 16] Compiling CapDL.Parser ( CapDL/Parser.hs, .stack-work/dist/x86_64-linux/Cabal-1.24.2.0/build/parse-capDL/parse-capDL-tmp/CapDL/Parser.o ) [16 of 16] Compiling Main ( Main.hs, .stack-work/dist/x86_64-linux/Cabal-1.24.2.0/build/parse-capDL/parse-capDL-tmp/Main.o ) Linking .stack-work/dist/x86_64-linux/Cabal-1.24.2.0/build/parse-capDL/parse-capDL ... capDL-tool-1.0.0.1: copy/register Installing executable(s) in /home/hedi/sel4-tutorials-default/ipc_build/ipc/parse_capdl_tool-prefix/src/parse_capdl_tool-build/.stack-work/install/x86_64-linux/lts-9.21/8.0.2/bin stack install Copying from /home/hedi/sel4-tutorials-default/ipc_build/ipc/parse_capdl_tool-prefix/src/parse_capdl_tool-build/.stack-work/install/x86_64-linux/lts-9.21/8.0.2/bin/parse-capDL to /home/hedi/sel4-tutorials-default/ipc_build/ipc/parse_capdl_tool-prefix/src/parse_capdl_tool-build/parse-capDL Copied executables to /home/hedi/sel4-tutorials-default/ipc_build/ipc/parse_capdl_tool-prefix/src/parse_capdl_tool-build: - parse-capDL Warning: Installation path /home/hedi/sel4-tutorials-default/ipc_build/ipc/parse_capdl_tool-prefix/src/parse_capdl_tool-build not found on the PATH environment variable. ninja: build stopped: subcommand failed. Any idea?