these 3 derivations will be built:
  /nix/store/7r8kk6nsxwaf4bwa2bl9si8v51cms1jc-source.drv
  /nix/store/vxlbf3zg9gz07dfip1vxs2xjdx17nnpl-fpc-3.2.2.drv
  /nix/store/4y410slqayi7spp2kd8jiy1g035kbjd5-gavrasm-5.4.drv
error: Cannot build '/nix/store/y9zjc10niz2m6paw5hi8gbg9briajnvq-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    402      0 --:--:-- --:--:-- --:--:--   403
       > 100   154    0   154    0     0    175      0 --:--:-- --:--:-- --:--:--     0
       > 100 74240    0 74240    0     0  50913      0 --:--:--  0:00:01 --:--:-- 50913
       > unpacking source archive /nix/var/nix/builds/nix-2797154-102480823/gavrasm_sources_lin_54.zip
       > [/nix/var/nix/builds/nix-2797154-102480823/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-2797154-102480823/gavrasm_sources_lin_54.zip or
       >         /nix/var/nix/builds/nix-2797154-102480823/gavrasm_sources_lin_54.zip.zip, and cannot find /nix/var/nix/builds/nix-2797154-102480823/gavrasm_sources_lin_54.zip.ZIP, period.
       > do not know how to unpack source archive /nix/var/nix/builds/nix-2797154-102480823/gavrasm_sources_lin_54.zip
       For full logs, run:
         nix log /nix/store/y9zjc10niz2m6paw5hi8gbg9briajnvq-source.drv
error: build of resolved derivation '/nix/store/y9zjc10niz2m6paw5hi8gbg9briajnvq-source.drv' failed
error: Cannot build '/nix/store/vxlbf3zg9gz07dfip1vxs2xjdx17nnpl-fpc-3.2.2.drv'.
       Reason: builder failed with exit code 2.
       Output paths:
         /nix/store/i7did40hc22zali5ryin53c4ifd4yyw3-fpc-3.2.2
       Last 25 log lines:
       > make[3]: Leaving directory '/build/fpcbuild-3.2.2/fpcsrc/rtl'
       > make[2]: Leaving directory '/build/fpcbuild-3.2.2/fpcsrc'
       > make packages_smart FPC=/build/fpcbuild-3.2.2/fpcsrc/compiler/ppc386 FPCFPMAKE=/build/fpcbuild-3.2.2/fpcsrc/compiler/ppc386 RELEASE=1 'OPT='
       > make[2]: Entering directory '/build/fpcbuild-3.2.2/fpcsrc'
       > make -C packages smart
       > make[3]: Entering directory '/build/fpcbuild-3.2.2/fpcsrc/packages'
       > make -C fpmkunit bootstrap
       > make[4]: Entering directory '/build/fpcbuild-3.2.2/fpcsrc/packages/fpmkunit'
       > /nix/store/llq0mpxdp39288c7jrxrnq0mm2ixndrh-coreutils-9.1/bin/mkdir -p units_bs/i386-linux
       > /build/fpcbuild-3.2.2/fpcsrc/compiler/ppc386 src/fpmkunit.pp  -Fu/build/fpcbuild-3.2.2/fpcsrc/rtl/units/i386-linux -FUunits_bs/i386-linux -Fu../paszlib/src -Fu../hash/src -Fi../paszlib/src  -Fi../fcl-process/src/unix -Fu../fcl-process/src -Fi../fcl-process/src/linux -Fi../fcl-process/src/dummy -Fu../libtar/src
       > make[4]: Leaving directory '/build/fpcbuild-3.2.2/fpcsrc/packages/fpmkunit'
       > /build/fpcbuild-3.2.2/fpcsrc/compiler/ppc386 fpmake.pp  -Fu/build/fpcbuild-3.2.2/fpcsrc/packages/fpmkunit/units_bs/i386-linux -Fu/build/fpcbuild-3.2.2/fpcsrc/rtl/units/i386-linux
       > /nix/store/cz0xzc39p2qj26ml15v9bq5ckrmdmdf4-binutils-2.39/bin/ld: /build/fpcbuild-3.2.2/fpcsrc/rtl/units/i386-linux/si_c21.o: in function `SI_C21_$$__FPC_LIBC21_START':
       > si_c21.pp:(.text.n_si_c21_$$__fpc_libc21_start+0x27): undefined reference to `__libc_csu_fini'
       > /nix/store/cz0xzc39p2qj26ml15v9bq5ckrmdmdf4-binutils-2.39/bin/ld: si_c21.pp:(.text.n_si_c21_$$__fpc_libc21_start+0x2c): undefined reference to `__libc_csu_init'
       > fpmake.pp(58,1) Error: Error while linking
       > fpmake.pp(58,1) Fatal: There were 1 errors compiling module, stopping
       > Fatal: Compilation aborted
       > make[3]: *** [Makefile:1719: fpmake] Error 1
       > make[3]: Leaving directory '/build/fpcbuild-3.2.2/fpcsrc/packages'
       > make[2]: *** [Makefile:2682: packages_smart] Error 2
       > make[2]: Leaving directory '/build/fpcbuild-3.2.2/fpcsrc'
       > make[1]: *** [Makefile:2837: build-stamp.i386-linux] Error 2
       > make[1]: Leaving directory '/build/fpcbuild-3.2.2/fpcsrc'
       > make: *** [Makefile:2306: fpcsrc/build-stamp.i386-linux] Error 2
       For full logs, run:
         nix log /nix/store/vxlbf3zg9gz07dfip1vxs2xjdx17nnpl-fpc-3.2.2.drv
error: Cannot build '/nix/store/4y410slqayi7spp2kd8jiy1g035kbjd5-gavrasm-5.4.drv'.
       Reason: 2 dependencies failed.
       Output paths:
         /nix/store/57w0dpnsbghzwhl0z7ra215p1zqdv38k-gavrasm-5.4