ghc-pkg list
/usr/lib64/ghc-8.10.2/package.conf.d
    Cabal-3.2.0.0
    HsYAML-0.2.1.0
    QuickCheck-2.14.1
    StateVar-1.2
    X11-1.9.2
    X11-xft-0.3.1
    adjunctions-4.4
    aeson-1.5.4.0
    alsa-core-0.5.0.1
    alsa-mixer-0.3.0
    ansi-terminal-0.11
    ansi-wl-pprint-0.6.9
    array-0.5.4.0
    asn1-encoding-0.9.6
    asn1-parse-0.9.5
    asn1-types-0.3.4
    assoc-1.0.2
    async-2.2.2
    attoparsec-0.13.2.4
    base-4.14.1.0
    base-compat-0.11.1
    base-compat-batteries-0.11.1
    base-orphans-0.8.2
    basement-0.0.11
    bifunctors-5.5.7
    binary-0.8.8.0
    blaze-builder-0.4.1.0
    blaze-html-0.9.1.2
    blaze-markup-0.8.2.7
    bytestring-0.10.10.0
    call-stack-0.2.0
    case-insensitive-1.2.1.0
    cereal-0.5.8.1
    clock-0.8
    cmdargs-0.10.20
    colour-2.3.5
    comonad-5.0.6
    conduit-1.3.2.1
    conduit-extra-1.3.5
    connection-0.3.1
    constraints-0.12
    containers-0.6.2.1
    contravariant-1.5.2
    cookie-0.4.5
    cryptonite-0.27
    data-default-0.7.1.1
    data-default-class-0.1.2.0
    data-default-instances-containers-0.0.1
    data-default-instances-dlist-0.0.1
    data-default-instances-old-locale-0.0.1
    data-fix-0.3.0
    dbus-1.2.16
    deepseq-1.4.4.0
    directory-1.3.6.0
    distributive-0.6.2
    dlist-1.0
    enclosed-exceptions-1.0.3
    exceptions-0.10.4
    extensible-exceptions-0.1.1.4
    extra-1.7.8
    filepath-1.4.2.1
    free-5.1.3
    fsnotify-0.3.0.1
    ghc-boot-8.10.2
    ghc-boot-th-8.10.2
    ghc-heap-8.10.2
    ghc-prim-0.6.1
    hashable-1.3.0.0
    hinotify-0.4
    hourglass-0.2.12
    hpc-0.6.1.0
    http-client-0.7.2.1
    http-client-tls-0.3.5.3
    http-conduit-2.3.7.3
    http-types-0.12.3
    integer-gmp-1.0.3.0
    integer-logarithms-1.0.3
    invariant-0.5.3
    kan-extensions-5.2
    lens-4.19.2
    libmpd-0.9.1.0
    libyaml-0.1.2
    lifted-async-0.10.1.2
    lifted-base-0.2.3.12
    memory-0.15.0
    mime-types-0.1.0.9
    monad-control-1.0.2.3
    monad-loops-0.4.3
    mono-traversable-1.0.15.1
    mtl-2.2.2
    netlink-1.1.1.0
    network-3.1.2.0
    network-uri-2.6.3.0
    old-locale-1.0.0.7
    old-time-1.1.0.3
    optparse-applicative-0.16.0.0
    parallel-3.2.2.0
    parsec-3.1.14.0
    parsec-numbers-0.1.0
    path-0.8.0
    path-io-1.6.0
    pem-0.2.4
    pretty-1.1.3.6
    pretty-hex-1.1
    primitive-0.7.1.0
    process-1.6.9.0
    profunctors-5.5.2
    random-1.1
    reflection-2.1.6
    regex-base-0.94.0.0
    regex-compat-0.95.2.0
    regex-posix-0.96.0.0
    regex-tdfa-1.3.1.0
    resourcet-1.2.4.2
    rts-1.0
    safe-0.3.19
    safe-exceptions-0.1.7.1
    scientific-0.3.6.2
    semigroupoids-5.3.4
    semigroups-0.19.1
    setlocale-1.0.0.9
    shakespeare-2.0.25
    shelly-1.9.0
    socks-0.6.1
    split-0.2.3.4
    splitmix-0.1.0.1
    stm-2.5.0.0
    streaming-commons-0.2.2.1
    strict-0.4
    syb-0.7.1
    system-fileio-0.3.16.4
    system-filepath-0.4.14
    tagged-0.8.6
    template-haskell-2.16.0.0
    temporary-1.3
    terminfo-0.4.1.4
    text-1.2.3.2
    th-abstraction-0.3.2.0
    th-lift-0.8.1
    these-1.1.1.1
    time-1.9.3
    time-compat-1.9.3
    timezone-olson-0.2.0
    timezone-series-0.1.9
    tls-1.5.4
    transformers-0.5.6.2
    transformers-base-0.4.5.2
    transformers-compat-0.6.5
    type-equality-1
    typed-process-0.2.6.0
    unix-2.7.2.2
    unix-compat-0.5.2
    unliftio-0.2.13
    unliftio-core-0.2.0.1
    unordered-containers-0.2.12.0
    utf8-string-1.0.1.1
    uuid-types-1.0.3
    vector-0.12.1.2
    vector-algorithms-0.8.0.3
    void-0.7.3
    x509-1.7.5
    x509-store-1.6.7
    x509-system-1.6.6
    x509-validation-1.6.11
    xml-conduit-1.9.0.0
    xml-types-0.3.8
    xmobar-0.36
    xmonad-0.15
    xmonad-contrib-0.16
    yaml-0.11.5.0
    zlib-0.6.2.2