The build is unreachable.

Build log

> /tmp/stackage-build2451$ stack unpack hlibsass-0.1.7.0@sha256:f7e5aced70f30a38f010eace7a1b1bf0978f9e50ef27e5c11bcce227571217d2
Unpacked hlibsass-0.1.7.0 to /tmp/stackage-build2451/hlibsass-0.1.7.0/
> /tmp/stackage-build2451/hlibsass-0.1.7.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb -hide-all-packages -package=Cabal -package=base -package=directory Setup
[1 of 1] Compiling Main             ( Setup.hs, Setup.o )

Setup.hs:38:13: warning: [-Wdeprecations]
    In the use of ‘preSDist’
    (imported from Distribution.Simple, but defined in Distribution.Simple.UserHooks):
    Deprecated: "SDist hooks violate the invariants of new-sdist. Use 'autogen-modules' and 'build-tool-depends' instead."
   |
38 |           , preSDist = updateLibsassVersion
   |             ^^^^^^^^
Linking Setup ...
> /tmp/stackage-build2451/hlibsass-0.1.7.0$ ./Setup configure --package-db=clear --package-db=global --package-db=/home/circleci/project/builds/nightly/pkgdb --libdir=/home/circleci/project/builds/nightly/lib --bindir=/home/circleci/project/builds/nightly/bin --datadir=/home/circleci/project/builds/nightly/share --libexecdir=/home/circleci/project/builds/nightly/libexec --sysconfdir=/home/circleci/project/builds/nightly/etc --docdir=/home/circleci/project/builds/nightly/doc/hlibsass-0.1.7.0 --htmldir=/home/circleci/project/builds/nightly/doc/hlibsass-0.1.7.0 --haddockdir=/home/circleci/project/builds/nightly/doc/hlibsass-0.1.7.0
make: Entering directory '/tmp/stackage-build2451/hlibsass-0.1.7.0/libsass'
mkdir lib
cc -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/cencode.o src/cencode.c
src/cencode.c: In function ‘base64_encode_block’:
src/cencode.c:50:5: warning: empty declaration
     __attribute__ ((fallthrough));
     ^
src/cencode.c:64:5: warning: empty declaration
     __attribute__ ((fallthrough));
     ^
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/ast.o src/ast.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/node.o src/node.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/context.o src/context.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/constants.o src/constants.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/functions.o src/functions.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/color_maps.o src/color_maps.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/environment.o src/environment.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/ast_fwd_decl.o src/ast_fwd_decl.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/bind.o src/bind.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/file.o src/file.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/util.o src/util.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/json.o src/json.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/units.o src/units.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/values.o src/values.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/plugins.o src/plugins.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/position.o src/position.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/lexer.o src/lexer.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/parser.o src/parser.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/prelexer.o src/prelexer.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/eval.o src/eval.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/expand.o src/expand.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/listize.o src/listize.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/cssize.o src/cssize.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/extend.o src/extend.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/output.o src/output.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/inspect.o src/inspect.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/emitter.o src/emitter.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/check_nesting.o src/check_nesting.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/remove_placeholders.o src/remove_placeholders.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/sass.o src/sass.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/sass_util.o src/sass_util.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/sass_values.o src/sass_values.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/sass_context.o src/sass_context.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/sass_functions.o src/sass_functions.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/sass2scss.o src/sass2scss.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/backtrace.o src/backtrace.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/operators.o src/operators.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/to_c.o src/to_c.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/to_value.o src/to_value.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/source_map.o src/source_map.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/subset_map.o src/subset_map.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/error_handling.o src/error_handling.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/memory/SharedPtr.o src/memory/SharedPtr.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/utf8_string.o src/utf8_string.cpp
g++ -Wall -O2 -DLIBSASS_VERSION="\"3.5.2\"" -std=c++0x -I /tmp/stackage-build2451/hlibsass-0.1.7.0/libsass/include -fPIC -fPIC -c -o src/base64vlq.o src/base64vlq.cpp
ar rcvs lib/libsass.a src/cencode.o src/ast.o src/node.o src/context.o src/constants.o src/functions.o src/color_maps.o src/environment.o src/ast_fwd_decl.o src/bind.o src/file.o src/util.o src/json.o src/units.o src/values.o src/plugins.o src/position.o src/lexer.o src/parser.o src/prelexer.o src/eval.o src/expand.o src/listize.o src/cssize.o src/extend.o src/output.o src/inspect.o src/emitter.o src/check_nesting.o src/remove_placeholders.o src/sass.o src/sass_util.o src/sass_values.o src/sass_context.o src/sass_functions.o src/sass2scss.o src/backtrace.o src/operators.o src/to_c.o src/to_value.o src/source_map.o src/subset_map.o src/error_handling.o src/memory/SharedPtr.o src/utf8_string.o src/base64vlq.o
a - src/cencode.o
a - src/ast.o
a - src/node.o
a - src/context.o
a - src/constants.o
a - src/functions.o
a - src/color_maps.o
a - src/environment.o
a - src/ast_fwd_decl.o
a - src/bind.o
a - src/file.o
a - src/util.o
a - src/json.o
a - src/units.o
a - src/values.o
a - src/plugins.o
a - src/position.o
a - src/lexer.o
a - src/parser.o
a - src/prelexer.o
a - src/eval.o
a - src/expand.o
a - src/listize.o
a - src/cssize.o
a - src/extend.o
a - src/output.o
a - src/inspect.o
a - src/emitter.o
a - src/check_nesting.o
a - src/remove_placeholders.o
a - src/sass.o
a - src/sass_util.o
a - src/sass_values.o
a - src/sass_context.o
a - src/sass_functions.o
a - src/sass2scss.o
a - src/backtrace.o
a - src/operators.o
a - src/to_c.o
a - src/to_value.o
a - src/source_map.o
a - src/subset_map.o
a - src/error_handling.o
a - src/memory/SharedPtr.o
a - src/utf8_string.o
a - src/base64vlq.o
make: Leaving directory '/tmp/stackage-build2451/hlibsass-0.1.7.0/libsass'
Configuring hlibsass-0.1.7.0...
> /tmp/stackage-build2451/hlibsass-0.1.7.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb -hide-all-packages -package=Cabal -package=base -package=directory Setup
> /tmp/stackage-build2451/hlibsass-0.1.7.0$ ./Setup build
Preprocessing library for hlibsass-0.1.7.0..
Building library for hlibsass-0.1.7.0..
[1 of 7] Compiling Bindings.Libsass.Base ( Bindings/Libsass/Base.hs, dist/build/Bindings/Libsass/Base.o )
[2 of 7] Compiling Bindings.Libsass.Types ( Bindings/Libsass/Types.hs, dist/build/Bindings/Libsass/Types.o )
[3 of 7] Compiling Bindings.Libsass.Functions ( Bindings/Libsass/Functions.hs, dist/build/Bindings/Libsass/Functions.o )
[4 of 7] Compiling Bindings.Libsass.Context ( Bindings/Libsass/Context.hs, dist/build/Bindings/Libsass/Context.o )
[5 of 7] Compiling Bindings.Libsass.Values ( Bindings/Libsass/Values.hs, dist/build/Bindings/Libsass/Values.o )
[6 of 7] Compiling Bindings.Libsass.Wrappers ( Bindings/Libsass/Wrappers.hs, dist/build/Bindings/Libsass/Wrappers.o )
[7 of 7] Compiling Bindings.Libsass ( Bindings/Libsass.hs, dist/build/Bindings/Libsass.o )
> /tmp/stackage-build2451/hlibsass-0.1.7.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb -hide-all-packages -package=Cabal -package=base -package=directory Setup
> /tmp/stackage-build2451/hlibsass-0.1.7.0$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181119/hlibsass-0.1.7.0-JJIBOiZLN6Q6ODBW0HETK2
> /tmp/stackage-build2451/hlibsass-0.1.7.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb -hide-all-packages -package=Cabal -package=base -package=directory Setup
> /tmp/stackage-build2451/hlibsass-0.1.7.0$ ./Setup register
Registering library for hlibsass-0.1.7.0..