linux build error: ld cannot find -lpthread and -lc

[juhp]

I tried building with ats-pkg on Fedora 31:

$ atspkg build --pkg-args './gc.dhall'
# pandoc (for man/poly.1)
Resolving dependencies...
Fetching stack...
Fetching concurrency...
Fetching edit-distance...
Fetching specats...
Fetching ats-bench...
Unpacking ats-bench...
Unpacking concurrency...
Unpacking specats...
Unpacking stack...
Unpacking edit-distance...
Building C dependencies...
# patsopt (for .atspkg/c/src/polyglot.c)
# gcc (for target/poly)
atspkg: Error when running Shake build system:
  at want, called at src/Language/ATS/Package/Build.hs:255:21 in ats-pkg-3.4.0.8-2ccd836ab739b6e2354fcd48211d6fb91ccf31d2e166ac71eed11909f32e7836:Language.ATS.Package.Build
* Depends on: target/poly
  at command, called at src/Development/Shake/C.hs:204:6 in shake-c-0.4.3.0-8e5a0098f011a4833609922116384224c45ddcb48eff0c45d1458eb3e81b1079:Development.Shake.C
* Raised the exception:
Development.Shake.command, system command failed
Command line: gcc -o target/poly .atspkg/c/src/polyglot.c -I/var/home/petersen/.atspkg/0.3.13/lib/ats2-postiats-0.3.13/ccomp/runtime -I/var/home/petersen/.atspkg/0.3.13/lib/ats2-postiats-0.3.13 -I/var/home/petersen/.atspkg/include -I.atspkg/contrib -latslib -lgc -lpthread -L/var/home/petersen/.atspkg/lib -L/var/home/petersen/.atspkg/0.3.13/lib/ats2-postiats-0.3.13/ccomp/atslib/lib -DATS_MEMALLOC_GCBDW -I include -I . -flto -O2 -static
Exit code: 1
Stderr:
.atspkg/c/src/polyglot.c: In function ‘__patsfun_1861__1861__1’:
.atspkg/c/src/polyglot.c:170253:1: warning: ‘readdir_r’ is deprecated [-Wdeprecated-declarations]
170253 | ATSINSmove(tmp8022__1, atslib_libats_libc_readdir_r(ATSPMVrefarg0(env0), ATSPMVrefarg1(ATSPMVptrof(ATSSELcon(tmp8020__1, postiats_tysum_18, atslab__0))), ATSPMVrefarg1(ATSPMVptrof(tmpref8021__1)))) ;
       | ^~~~~~~~~~
In file included from /var/home/petersen/.atspkg/0.3.13/lib/ats2-postiats-0.3.13/libats/libc/CATS/dirent.cats:44,
                 from .atspkg/c/src/polyglot.c:267:
/usr/include/dirent.h:183:12: note: declared here
  183 | extern int readdir_r (DIR *__restrict __dirp,
      |            ^~~~~~~~~
.atspkg/c/src/polyglot.c: In function ‘__patsfun_1861__1861__2’:
.atspkg/c/src/polyglot.c:173971:1: warning: ‘readdir_r’ is deprecated [-Wdeprecated-declarations]
173971 | ATSINSmove(tmp8022__2, atslib_libats_libc_readdir_r(ATSPMVrefarg0(env0), ATSPMVrefarg1(ATSPMVptrof(ATSSELcon(tmp8020__2, postiats_tysum_18, atslab__0))), ATSPMVrefarg1(ATSPMVptrof(tmpref8021__2)))) ;
       | ^~~~~~~~~~
In file included from /var/home/petersen/.atspkg/0.3.13/lib/ats2-postiats-0.3.13/libats/libc/CATS/dirent.cats:44,
                 from .atspkg/c/src/polyglot.c:267:
/usr/include/dirent.h:183:12: note: declared here
  183 | extern int readdir_r (DIR *__restrict __dirp,
      |            ^~~~~~~~~
.atspkg/c/src/polyglot.c: In function ‘__patsfun_1861__1861__3’:
.atspkg/c/src/polyglot.c:176913:1: warning: ‘readdir_r’ is deprecated [-Wdeprecated-declarations]
176913 | ATSINSmove(tmp8022__3, atslib_libats_libc_readdir_r(ATSPMVrefarg0(env0), ATSPMVrefarg1(ATSPMVptrof(ATSSELcon(tmp8020__3, postiats_tysum_18, atslab__0))), ATSPMVrefarg1(ATSPMVptrof(tmpref8021__3)))) ;
       | ^~~~~~~~~~
In file included from /var/home/petersen/.atspkg/0.3.13/lib/ats2-postiats-0.3.13/libats/libc/CATS/dirent.cats:44,
                 from .atspkg/c/src/polyglot.c:267:
/usr/include/dirent.h:183:12: note: declared here
  183 | extern int readdir_r (DIR *__restrict __dirp,
      |            ^~~~~~~~~
.atspkg/c/src/polyglot.c: In function ‘__patsfun_1861__1861__4’:
.atspkg/c/src/polyglot.c:250859:1: warning: ‘readdir_r’ is deprecated [-Wdeprecated-declarations]
250859 | ATSINSmove(tmp8022__4, atslib_libats_libc_readdir_r(ATSPMVrefarg0(env0), ATSPMVrefarg1(ATSPMVptrof(ATSSELcon(tmp8020__4, postiats_tysum_18, atslab__0))), ATSPMVrefarg1(ATSPMVptrof(tmpref8021__4)))) ;
       | ^~~~~~~~~~
In file included from /var/home/petersen/.atspkg/0.3.13/lib/ats2-postiats-0.3.13/libats/libc/CATS/dirent.cats:44,
                 from .atspkg/c/src/polyglot.c:267:
/usr/include/dirent.h:183:12: note: declared here
  183 | extern int readdir_r (DIR *__restrict __dirp,
      |            ^~~~~~~~~
.atspkg/c/src/polyglot.c: In function ‘__patsfun_1861__1861__5’:
.atspkg/c/src/polyglot.c:253801:1: warning: ‘readdir_r’ is deprecated [-Wdeprecated-declarations]
253801 | ATSINSmove(tmp8022__5, atslib_libats_libc_readdir_r(ATSPMVrefarg0(env0), ATSPMVrefarg1(ATSPMVptrof(ATSSELcon(tmp8020__5, postiats_tysum_18, atslab__0))), ATSPMVrefarg1(ATSPMVptrof(tmpref8021__5)))) ;
       | ^~~~~~~~~~
In file included from /var/home/petersen/.atspkg/0.3.13/lib/ats2-postiats-0.3.13/libats/libc/CATS/dirent.cats:44,
                 from .atspkg/c/src/polyglot.c:267:
/usr/include/dirent.h:183:12: note: declared here
  183 | extern int readdir_r (DIR *__restrict __dirp,
      |            ^~~~~~~~~
/usr/bin/ld: cannot find -lpthread
/usr/bin/ld: cannot find -lc
collect2: error: ld returned 1 exit status

Any ideas?