"Binary file not found at binarypath in json file"

[catthou]

I'm trying to make a dolphin file manager appimage. Here's my json:

{
    "buildinfo": [
    {
        "prerun": [
            "curl -sL http://archive.ubuntu.com/ubuntu/pool/universe/d/dolphin/dolphin_21.12.3-0ubuntu1_amd64.deb -o ~/.cache/dolphin_21.12.3-0ubuntu1_amd64.deb"
        ],
        "name": "dolphin",
        "version": "linux",
        "deps": "baloo-kf5,kinit,kio,libc6,libdolphinvcs5,libgcc-s1,libkf5activities5,libkf5baloo5,libkf5baloowidgets5,libkf5bookmarks5,libkf5codecs5,libkf5completion5,libkf5configcore5,libkf5configgui5,libkf5configwidgets5,libkf5coreaddons5,libkf5crash5,libkf5dbusaddons5,libkf5filemetadata3,libkf5i18n5,libkf5iconthemes5,libkf5itemviews5,libkf5jobwidgets5,libkf5kcmutils5,libkf5kiocore5,libkf5kiofilewidgets5,libkf5kiogui5,libkf5kiowidgets5,libkf5newstuff5,libkf5notifications5,libkf5parts5,libkf5service-bin,libkf5service5,libkf5solid5,libkf5textwidgets5,libkf5widgetsaddons5,libkf5windowsystem5,libkf5xmlgui5,libkuserfeedbackcore1,libkuserfeedbackwidgets1,libpackagekitqt5-1,libphonon4qt5-4,libqt5core5a,libqt5dbus5,libqt5gui5,libqt5widgets5,libqt5xml5,libstdc++6,phonon4qt5,ffmpegthumbs,kdegraphics-thumbnailers,kimageformat-plugins,kio-extras,dolphin-plugins",
        "repoarch": "amd64",
        "distrorepo": "Ubuntu",
        "repoversion": "jammy",
        "binarypath": "/usr/bin/dolphin",
        "desktoppath": "/usr/share/applications/org.kde.dolphin.desktop",
        "iconpath": null,
        "usewrapper": "true",
        "postrun": [
            null
        ]
    }
    ],
    "apprunconf": [
    {
        "setpath": "true",
        "setlibpath": "true",
        "setpythonpath": "false",
        "setpythonhome": "false",
        "setpythondontwritebytecode": "false",
        "setxdgdatadirs": "false",
        "setperllib": "false",
        "setgsettingsschemadir": "false",
        "setqtpluginpath": "false",
        "exec": "/usr/bin/dolphin.wrapper"
    }
    ],
    "authors": [
    {
        "type": "Author",
        "author": "parsecgaming",
        "url": "https://parsecgaming.com"
    },
    {
        "type": "AppImage Maintainer",
        "author": "E5ten",
        "url": "https://github.com/E5ten"
    }
    ]
}

And here's my debug output around the point of error:

...
+ echo 'Preparing AppImage AppDir...'
Preparing AppImage AppDir...
+ prepareappdir
++ jq -r '.buildinfo[0].name' /home/haruka/.cache/deb2appimage/build.json
+ APP_NAME=dolphin
++ jq -r '.buildinfo[0].binarypath' /home/haruka/.cache/deb2appimage/build.json
+ BINARY_PATH=/./usr/bin/dolphin
++ jq -r '.buildinfo[0].desktoppath' /home/haruka/.cache/deb2appimage/build.json
+ DESKTOP_PATH=/usr/share/applications/org.kde.dolphin.desktop
++ jq -r '.buildinfo[0].iconpath' /home/haruka/.cache/deb2appimage/build.json
+ ICON_PATH=null
++ jq -r '.buildinfo[0].usewrapper' /home/haruka/.cache/deb2appimage/build.json
+ USE_WRAPPER=true
+ '[' dolphin = null ']'
+ '[' '!' -f /home/haruka/.cache/deb2appimage/AppDir/usr/bin/dolphin ']'
+ d2aexit 2 'Binary file not found at binarypath in json file'
+ case $1 in
+ '[' '!' '' = TRUE ']'
+ echo 'Input Error!'
Input Error!
+ echo 'Binary file not found at binarypath in json file'
Binary file not found at binarypath in json file
+ '[' -n '' ']'
+ echo 'Exit code 2'
Exit code 2
+ rm -rf /home/haruka/.cache/deb2appimage/AppDir /home/haruka/.cache/deb2appimage/build.json /home/haruka/.cache/deb2appimage/debs /home/haruka/.cache/deb2appimage/other
+ exit 2

I'm not sure what the 'proper' path is supposed to be, though!

It's also very frustrating that the .cache state isn't preserved, because after trying a few different changes, ubuntu appears to have throttled me. I can't download the whole list of dependencies anymore; I get a generic downloading error from curl. It'd be nice to save and reuse files from .cache even if only during --debug.