these 2 derivations will be built:
  /nix/store/67qb4as85n2snmpw3lq1z3q15fbvk1wl-source.drv
  /nix/store/bgkfczrjv0i930q9fnakd4mk9g17diaa-gavrasm-5.4.drv
this path will be fetched (38.0 MiB download, 333.6 MiB unpacked):
  /nix/store/39kvxlwdynv4i5ld32103k223q0dppp9-fpc-3.2.2
building '/nix/store/cvm5n84frz70qrqcdh87rz5rajiyp0sh-source.drv'
source> 
source> trying http://www.avr-asm-tutorial.net/gavrasm/v54/gavrasm_sources_lin_54.zip
source>   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
source>                                  Dload  Upload   Total   Spent    Left  Speed
source> 100   178    0   178    0     0   1795      0 --:--:-- --:--:-- --:--:--  1816
source> 100   154    0   154    0     0    257      0 --:--:-- --:--:-- --:--:--   257
source> 100 74240    0 74240    0     0  62212      0 --:--:--  0:00:01 --:--:-- 66866
source> unpacking source archive /nix/var/nix/builds/nix-3789161-2178196481/gavrasm_sources_lin_54.zip
source> [/nix/var/nix/builds/nix-3789161-2178196481/gavrasm_sources_lin_54.zip]
source>   End-of-central-directory signature not found.  Either this file is not
source>   a zipfile, or it constitutes one disk of a multi-part archive.  In the
source>   latter case the central directory and zipfile comment will be found on
source>   the last disk(s) of this archive.
source> unzip:  cannot find zipfile directory in one of /nix/var/nix/builds/nix-3789161-2178196481/gavrasm_sources_lin_54.zip or
source>         /nix/var/nix/builds/nix-3789161-2178196481/gavrasm_sources_lin_54.zip.zip, and cannot find /nix/var/nix/builds/nix-3789161-2178196481/gavrasm_sources_lin_54.zip.ZIP, period.
source> do not know how to unpack source archive /nix/var/nix/builds/nix-3789161-2178196481/gavrasm_sources_lin_54.zip
error: Cannot build '/nix/store/cvm5n84frz70qrqcdh87rz5rajiyp0sh-source.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/k3g1iapg7xv8vp5c59p37v7nrvr9h8qh-source
       Last 16 log lines:
       >
       > trying http://www.avr-asm-tutorial.net/gavrasm/v54/gavrasm_sources_lin_54.zip
       >   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
       >                                  Dload  Upload   Total   Spent    Left  Speed
       > 100   178    0   178    0     0   1795      0 --:--:-- --:--:-- --:--:--  1816
       > 100   154    0   154    0     0    257      0 --:--:-- --:--:-- --:--:--   257
       > 100 74240    0 74240    0     0  62212      0 --:--:--  0:00:01 --:--:-- 66866
       > unpacking source archive /nix/var/nix/builds/nix-3789161-2178196481/gavrasm_sources_lin_54.zip
       > [/nix/var/nix/builds/nix-3789161-2178196481/gavrasm_sources_lin_54.zip]
       >   End-of-central-directory signature not found.  Either this file is not
       >   a zipfile, or it constitutes one disk of a multi-part archive.  In the
       >   latter case the central directory and zipfile comment will be found on
       >   the last disk(s) of this archive.
       > unzip:  cannot find zipfile directory in one of /nix/var/nix/builds/nix-3789161-2178196481/gavrasm_sources_lin_54.zip or
       >         /nix/var/nix/builds/nix-3789161-2178196481/gavrasm_sources_lin_54.zip.zip, and cannot find /nix/var/nix/builds/nix-3789161-2178196481/gavrasm_sources_lin_54.zip.ZIP, period.
       > do not know how to unpack source archive /nix/var/nix/builds/nix-3789161-2178196481/gavrasm_sources_lin_54.zip
       For full logs, run:
         nix log /nix/store/cvm5n84frz70qrqcdh87rz5rajiyp0sh-source.drv
error: build of resolved derivation '/nix/store/cvm5n84frz70qrqcdh87rz5rajiyp0sh-source.drv' failed
error: Cannot build '/nix/store/bgkfczrjv0i930q9fnakd4mk9g17diaa-gavrasm-5.4.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/flgan1mvwj7jqqwzzxq7p35qnk2mfk8p-gavrasm-5.4