closure-size: glibc-info broken

[deepfire]

As of 34b5d193c0c0c02bd0f17b8af9d8fa9422c75782:

post-installation fixup
Moving /nix/store/w2crcsr7mrbhymwz99vwq354iyjkjflv-glibc-info-2.21/share/info to /nix/store/kyh6dx0ils5fh6lmv059ssimk10irkn1-glibc-info-2.21-bin/share/info
Removing empty /nix/store/w2crcsr7mrbhymwz99vwq354iyjkjflv-glibc-info-2.21/share/ and (possibly) its parents
rmdir: failed to remove directory '/nix/store'
patching ELF executables and libraries in /nix/store/99jld2wg17ajigpj9l90pdhdlbyflq36-glibc-info-2.21-dev
patching ELF executables and libraries in /nix/store/w2crcsr7mrbhymwz99vwq354iyjkjflv-glibc-info-2.21
patching ELF executables and libraries in /nix/store/kyh6dx0ils5fh6lmv059ssimk10irkn1-glibc-info-2.21-bin
patching script interpreter paths in /nix/store/kyh6dx0ils5fh6lmv059ssimk10irkn1-glibc-info-2.21-bin
patching ELF executables and libraries in /nix/store/r3w88zqkg5dj7y2pa4s2ssh7bdavi0cq-glibc-info-2.21-static
builder for ‘/nix/store/yhy4jqhfkwpdm7gk5n0zb5jc9m74v5lk-glibc-info-2.21.drv’ failed to produce output path ‘/nix/store/w2crcsr7mrbhymwz99vwq354iyjkjflv-glibc-info-2.21’
error: build of ‘/nix/store/yhy4jqhfkwpdm7gk5n0zb5jc9m74v5lk-glibc-info-2.21.drv’ failed

..it appears as if the output directory has a -dev suffix, but shouldn't?