lstat("/tmp/nix-shell-2588-0/derivation", {st_mode=S_IFLNK|0777, st_size=53, ...}) = 0
readlink("/tmp/nix-shell-2588-0/derivation", "/nix/store/cj2rgssqyyzcl9z42c0ds"..., 53) = 53
socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0) = 3
fcntl(3, F_GETFD)                       = 0x1 (flags FD_CLOEXEC)
fcntl(3, F_SETFD, FD_CLOEXEC)           = 0
connect(3, {sa_family=AF_UNIX, sun_path="/nix/var/nix/daemon-socket/socket"}, 110) = 0
write(3, "cxin\0\0\0\0", 8)             = 8
read(3, "oixd\0\0\0\0\22\1\0\0\0\0\0\0", 32768) = 16
sched_getaffinity(0, 128, [3])          = 48
sched_setaffinity(0, 128, [3])          = 0
write(3, "\22\1\0\0\0\0\0\0\1\0\0\0\0\0\0\0\3\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 32) = 32
read(3, "stla\0\0\0\0", 32768)          = 8
write(3, "\23\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 168) = 168
read(3, "stla\0\0\0\0", 32768)          = 8
write(3, "\n\0\0\0\0\0\0\0005\0\0\0\0\0\0\0/nix/store/cj2rg"..., 72) = 72
read(3, "stla\0\0\0\0\1\0\0\0\0\0\0\0", 32768) = 16
write(3, "\1\0\0\0\0\0\0\0005\0\0\0\0\0\0\0/nix/store/cj2rg"..., 72) = 72
read(3, "stla\0\0\0\0\1\0\0\0\0\0\0\0", 32768) = 16
open("/nix/store/cj2rgssqyyzcl9z42c0dsb73wgpgm5pv-shell.drv", O_RDONLY|O_CLOEXEC) = 4
fstat(4, {st_mode=S_IFREG|0444, st_size=968, ...}) = 0
read(4, "Derive([(\"out\",\"/nix/store/q6kni"..., 968) = 968
close(4)                                = 0
pipe2([4, 5], O_CLOEXEC)                = 0
vfork()                                 = 2597
close(5)                                = 0
read(4,