Can't compile your app

Hi!

I'd realy need this app to work for my school project, but i can't compile it.

```
+ mkdir -p build
+ cd build
+ cmake -GNinja ..
'icons/hicolor/256x256/oscope.png' > /home/jaka/Downloads/oscope/build/gen.qrc
-- Configuring done
-- Generating done
-- Build files have been written to: /home/jaka/Downloads/oscope/build
+ ninja
[1/16] cd /home/jaka/Downloads/oscope/build && mkdir -p icons/hicolor/64x64 && inkscape -z -e icons/hicolor/64x64/oscope.png -w 64 -h 64 /home/jaka/Downloads/oscope/resources/oscope.svg
FAILED: CMakeFiles/icon_64 icons/hicolor/64x64/oscope.png /home/jaka/Downloads/oscope/build/CMakeFiles/icon_64 /home/jaka/Downloads/oscope/build/icons/hicolor/64x64/oscope.png
cd /home/jaka/Downloads/oscope/build && mkdir -p icons/hicolor/64x64 && inkscape -z -e icons/hicolor/64x64/oscope.png -w 64 -h 64 /home/jaka/Downloads/oscope/resources/oscope.svg
Warning: Option --without-gui= is deprecated
Unknown option -e
[2/16] cd /home/jaka/Downloads/oscope/build && mkdir -p icons/hicolor/16x16 && inkscape -z -e icons/hicolor/16x16/oscope.png -w 16 -h 16 /home/jaka/Downloads/oscope/resources/oscope.svg
FAILED: CMakeFiles/icon_16 icons/hicolor/16x16/oscope.png /home/jaka/Downloads/oscope/build/CMakeFiles/icon_16 /home/jaka/Downloads/oscope/build/icons/hicolor/16x16/oscope.png
cd /home/jaka/Downloads/oscope/build && mkdir -p icons/hicolor/16x16 && inkscape -z -e icons/hicolor/16x16/oscope.png -w 16 -h 16 /home/jaka/Downloads/oscope/resources/oscope.svg
Warning: Option --without-gui= is deprecated
Unknown option -e
[3/16] cd /home/jaka/Downloads/oscope/build && mkdir -p icons/hicolor/128x128 && inkscape -z ...ons/hicolor/128x128/oscope.png -w 128 -h 128 /home/jaka/Downloads/oscope/resources/oscope.svg
FAILED: CMakeFiles/icon_128 icons/hicolor/128x128/oscope.png /home/jaka/Downloads/oscope/build/CMakeFiles/icon_128 /home/jaka/Downloads/oscope/build/icons/hicolor/128x128/oscope.png
cd /home/jaka/Downloads/oscope/build && mkdir -p icons/hicolor/128x128 && inkscape -z -e icons/hicolor/128x128/oscope.png -w 128 -h 128 /home/jaka/Downloads/oscope/resources/oscope.svg
Warning: Option --without-gui= is deprecated
Unknown option -e
[4/16] cd /home/jaka/Downloads/oscope/build && mkdir -p icons/hicolor/256x256 && inkscape -z ...ons/hicolor/256x256/oscope.png -w 256 -h 256 /home/jaka/Downloads/oscope/resources/oscope.svg
FAILED: CMakeFiles/icon_256 icons/hicolor/256x256/oscope.png /home/jaka/Downloads/oscope/build/CMakeFiles/icon_256 /home/jaka/Downloads/oscope/build/icons/hicolor/256x256/oscope.png
cd /home/jaka/Downloads/oscope/build && mkdir -p icons/hicolor/256x256 && inkscape -z -e icons/hicolor/256x256/oscope.png -w 256 -h 256 /home/jaka/Downloads/oscope/resources/oscope.svg
Warning: Option --without-gui= is deprecated
Unknown option -e
[5/16] cd /home/jaka/Downloads/oscope/build && mkdir -p icons/hicolor/32x32 && inkscape -z -e icons/hicolor/32x32/oscope.png -w 32 -h 32 /home/jaka/Downloads/oscope/resources/oscope.svg
FAILED: CMakeFiles/icon_32 icons/hicolor/32x32/oscope.png /home/jaka/Downloads/oscope/build/CMakeFiles/icon_32 /home/jaka/Downloads/oscope/build/icons/hicolor/32x32/oscope.png
cd /home/jaka/Downloads/oscope/build && mkdir -p icons/hicolor/32x32 && inkscape -z -e icons/hicolor/32x32/oscope.png -w 32 -h 32 /home/jaka/Downloads/oscope/resources/oscope.svg
Warning: Option --without-gui= is deprecated
Unknown option -e
ninja: build stopped: subcommand failed.
```

Here is my terminal output when i run runbuild.sh.