these 4 derivations will be built:
  /nix/store/29r0mvvjn6xwr89z4ihfrqi42m6pn45x-clan-cli-source.drv
  /nix/store/03aws24dyp5ra50hx2i4019rc6fwp23q-clan-cli.drv
  /nix/store/av3xypgfszs5c9dlh23j3qamxzkzxyfv-closure-info.drv
  /nix/store/axvlv3kg23vysa2d7gxr2rsqgmys65pz-check-vars.drv
error: Cannot build '/nix/store/axvlv3kg23vysa2d7gxr2rsqgmys65pz-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/fl2s6bvdsb4r2l3vfiwqq4aw3l9l51bb-check-vars
       Last 25 log lines:
       > + shift
       > + local 'hooksSlice=failureHooks[@]'
       > + local hook
       > + for hook in "_callImplicitHook 0 $hookName" ${!hooksSlice+"${!hooksSlice}"}
       > + _logHook failureHook '_callImplicitHook 0 failureHook'
       > + [[ -z 2 ]]
       > + local hookKind=failureHook
       > + local 'hookExpr=_callImplicitHook 0 failureHook'
       > + shift 2
       > + declare -F '_callImplicitHook 0 failureHook'
       > + type -p '_callImplicitHook 0 failureHook'
       > + [[ _callImplicitHook 0 failureHook != _callImplicitHook* ]]
       > + _eval '_callImplicitHook 0 failureHook'
       > + declare -F '_callImplicitHook 0 failureHook'
       > + eval '_callImplicitHook 0 failureHook'
       > ++ _callImplicitHook 0 failureHook
       > ++ local def=0
       > ++ local hookName=failureHook
       > ++ declare -F failureHook
       > ++ type -p failureHook
       > ++ '[' -n '' ']'
       > ++ return 0
       > + return 0
       > + '[' -n '' ']'
       > + return 1
       For full logs, run:
         nix log /nix/store/axvlv3kg23vysa2d7gxr2rsqgmys65pz-check-vars.drv