My `ghc-pkg list` as of now.

ghc-pkg_list

/usr/local/haskell/lib/ghc-7.8.2/package.conf.d:
    Cabal-1.18.1.3
    array-0.5.0.0
    base-4.7.0.0
    bin-package-db-0.0.0.0
    binary-0.7.1.0
    rts-1.0
    bytestring-0.10.4.0
    containers-0.5.5.1
    deepseq-1.3.0.2
    directory-1.2.1.0
    filepath-1.3.0.2
    (ghc-7.8.2)
    ghc-prim-0.3.1.0
    (haskell2010-1.1.2.0)
    (haskell98-2.0.0.3)
    hoopl-3.10.0.1
    hpc-0.6.0.1
    integer-gmp-0.5.1.0
    old-locale-1.0.0.6
    old-time-1.1.0.2
    pretty-1.1.1.1
    process-1.2.0.0
    template-haskell-2.9.0.0
    time-1.4.2
    transformers-0.3.0.0
    unix-2.7.0.1

/home/sagemuej/.ghc/x86_64-linux-7.8.2/package.conf.d:
    Boolean-0.2.1
    FTGL-1.333
    GLFW-0.5.2.0
    GLURaw-1.4.0.0
    GLURaw-1.4.0.1
    Glob-0.7.4
    {HTTP-4000.2.12}
    HTTP-4000.2.13
    HaskellForMaths-0.4.5
    Lattices-0.0.1
    MemoTrie-0.6.2
    MonadRandom-0.1.13
    NumInstances-1.3
    OpenGL-2.9.2.0
    OpenGLRaw-1.4.0.0
    OpenGLRaw-1.5.0.0
    QuickCheck-2.7.5
    SHA-1.6.4
    abstract-deque-0.3
    abstract-par-0.3.3
    aeson-0.7.0.3
    ansi-terminal-0.6.1.1
    asn1-encoding-0.8.1.3
    asn1-parse-0.8.1
    asn1-types-0.2.3
    async-2.0.1.5
    attoparsec-0.11.2.1
    attoparsec-conduit-1.1.0
    authenticate-1.3.2.8
    base-unicode-symbols-0.2.2.4
    base16-bytestring-0.1.1.6
    base64-bytestring-1.0.0.1
    bitmap-0.0.2
    blaze-builder-0.3.3.2
    blaze-builder-conduit-1.1.0
    blaze-html-0.7.0.1
    blaze-markup-0.6.0.0
    byteable-0.1.1
    byteorder-1.0.4
    cairo-0.12.5.3
    case-insensitive-1.2.0.0
    cereal-0.4.0.1
    cipher-aes-0.2.7
    cipher-rc4-0.1.4
    clientsession-0.9.0.3
    comonad-4.2
    conduit-1.1.0.2
    conduit-extra-1.1.0.1
    connection-0.2.1
    constrained-categories-0.1
    contravariant-0.5.1
    control-monad-omega-0.3
    cookie-0.4.1.1
    cprng-aes-0.5.2
    criterion-0.8.0.2
    crypto-api-0.13
    crypto-cipher-types-0.0.9
    crypto-numbers-0.2.3
    crypto-pubkey-0.2.4
    crypto-pubkey-types-0.4.2.2
    crypto-random-0.0.7
    cryptohash-0.11.4
    css-text-0.1.2.1
    data-default-0.5.3
    data-default-class-0.0.1
    data-default-instances-base-0.0.1
    data-default-instances-containers-0.0.1
    data-default-instances-dlist-0.0.1
    data-default-instances-old-locale-0.0.1
    distributive-0.4.3.2
    dlist-0.7.0.1
    {dynamic-plot-0.1}
    easyrender-0.1.0.0
    email-validate-2.0.1
    entropy-0.2.2.4
    erf-2.0.0.0
    exceptions-0.5
    exceptions-0.6.1
    extensible-exceptions-0.1.1.4
    fast-logger-2.1.5
    file-embed-0.0.6
    fixedprec-0.2.2.0
    ghc-mtl-1.2.1.0
    ghc-paths-0.1.0.9
    gio-0.12.5.3
    glib-0.12.5.4
    graphics-drawingcombinators-1.5
    gtk-0.12.5.7
    haddock-2.14.2
    hamlet-1.2.0
    hashable-1.2.1.0
    hashtables-1.1.2.1
    hastache-0.6.0
    hmatrix-0.15.2.1
    hscolour-1.20.3
    http-client-0.3.1.1
    http-client-tls-0.2.1.1
    http-conduit-2.1.1
    http-date-0.0.4
    http-types-0.8.4
    ieee754-0.7.3
    {implicit-clustered-0.1.0.0}
    lifted-base-0.2.2.1
    {manifolds-0.1}
    math-functions-0.1.5.2
    mime-mail-0.4.5.1
    mime-types-0.1.0.4
    mmorph-1.0.2
    monad-control-0.3.2.3
    monad-logger-0.3.6
    monad-loops-0.4.2
    monad-par-0.3.4.6
    monad-par-extras-0.3.3
    mtl-2.1.3.1
    mwc-random-0.13.1.1
    nats-0.1.2
    {network-2.4.2.2}
    network-2.5.0.0
    network-conduit-1.1.0
    newsynth-0.2
    pango-0.12.5.3
    parallel-3.2.0.4
    parsec-3.1.5
    path-pieces-0.1.3.1
    pem-0.2.2
    perhaps-difficult-0.1.0.0
    persistent-1.3.0.6
    persistent-template-1.3.1.3
    primes-0.2.1.0
    primitive-0.5.2.1
    publicsuffixlist-0.1
    pwstore-fast-2.4.1
    random-1.0.1.1
    random-shuffle-0.0.4
    resource-pool-0.2.1.1
    resourcet-1.1.2
    safe-0.3.4
    scientific-0.2.0.2
    securemem-0.1.3
    semigroups-0.13.0.1
    set-monad-0.1.0.0
    shakespeare-2.0.0.3
    shakespeare-css-1.1.0
    shakespeare-i18n-1.1.0
    shakespeare-js-1.3.0
    silently-1.2.4.1
    simple-sendfile-0.2.14
    skein-1.0.9
    socks-0.5.4
    statistics-0.10.5.2
    stb-image-0.2.1
    stm-2.4.3
    stm-chans-3.0.0.2
    storable-complex-0.2.1
    streaming-commons-0.1.1
    stringsearch-0.3.6.5
    superdoc-0.1.2.0
    syb-0.4.1
    system-fileio-0.3.12
    system-filepath-0.4.10
    tagged-0.7.2
    tagsoup-0.13.1
    tagstream-conduit-0.5.5.1
    text-1.1.0.1
    tf-random-0.5
    tls-1.2.6
    transformers-base-0.4.1
    transformers-compat-0.1.1.1
    trivial-constraint-0.1.0.0
    trivial-constraint-0.2.0.0
    trivial-constraint-0.3.0.0
    unix-compat-0.4.1.1
    unix-time-0.2.2
    unordered-containers-0.2.4.0
    utf8-string-0.3.7
    vault-0.3.0.3
    vector-0.10.9.1
    vector-algorithms-0.6.0.1
    vector-binary-instances-0.2.1.0
    vector-space-0.8.6
    vector-th-unbox-0.2.0.2
    void-0.6.1
    wai-2.1.0.2
    wai-extra-2.1.1.1
    wai-logger-2.1.1
    warp-2.1.4.1
    word8-0.0.4
    x509-1.4.11
    x509-store-1.4.4
    x509-system-1.4.2
    x509-validation-1.5.0
    xhtml-3000.2.1
    xml-conduit-1.2.0.1
    xml-types-0.3.4
    xss-sanitize-0.3.5.2
    yaml-0.8.8.2
    yesod-1.2.5.2
    yesod-auth-1.3.0.4
    yesod-core-1.2.14
    yesod-form-1.3.8.2
    yesod-persistent-1.2.2.3
    yesod-routes-1.2.0.6
    zlib-0.5.4.1
    zlib-conduit-1.1.0