500084 2025-02-14 17:26:48 +0000 isoimagewriter: Fails to write ISO on NixOS, aborting with error "The last block was not fully written (-1 of 1,048,576 bytes)!" while alternative writers work correctly. 2025-03-13 04:46:42 +0000 1 1 2 Applications isoimagewriter general 24.12.2 NixOS Linux RESOLVED DUPLICATE 445036 NOR major --- 0 kdebugtracking.swipe269 jr john 0 oldest_to_newest 2398058 0 kdebugtracking.swipe269 2025-02-14 17:26:48 +0000 SUMMARY The KDE isoimagewriter does not work on NixOS whether downloaded from nixpkgs repo or flathub repo. Application loads but when you finalize your devide to write the ISO to, it produces the following error 'The last block was not fully written (-1 of 1,048,576 bytes)! Aborting." STEPS TO REPRODUCE 1. Download isoimagewriter on nixos through nixpkgs or flathub 2. Attempt to write an ISO to a USB drive. 3. View the error OBSERVED RESULT Produces error "The last block was not fully written (-1 of 1,048,576 bytes)! Aborting." EXPECTED RESULT Should write the ISO to the USB without issue. SOFTWARE/OS VERSIONS Linux/KDE Plasma: NixOS 25.05 KDE Plasma Version: 6.3 KDE Frameworks Version: 6.10.0 Qt Version: 6.8.2 ADDITIONAL INFORMATION Using other ISO image writers such as fedora image writer works just fine. Only KDE one doesn't work on NixOS. 2407200 1 john 2025-03-13 04:46:42 +0000 Hi - merging this in with the existing open bug report regarding this issue. Thanks! *** This bug has been marked as a duplicate of bug 445036 ***