diff --git a/src/libstore/linux/fchmodat2-compat.hh b/src/libstore/linux/fchmodat2-compat.hh
deleted file mode 100644
index fd03b9ed5..000000000
--- a/src/libstore/linux/fchmodat2-compat.hh
+++ /dev/null
@@ -1,34 +0,0 @@
-/*
- * Determine the syscall number for `fchmodat2`.
- *
- * On most platforms this is 452. Exceptions can be found on
- * a glibc git checkout via `rg --pcre2 'define __NR_fchmodat2 (?!452)'`.
- *
- * The problem is that glibc 2.39 and libseccomp 2.5.5 are needed to
- * get the syscall number. However, a Nix built against nixpkgs 23.11
- * (glibc 2.38) should still have the issue fixed without depending
- * on the build environment.
- *
- * To achieve that, the macros below try to determine the platform and
- * set the syscall number which is platform-specific, but
- * in most cases 452.
- *
- * TODO: remove this when 23.11 is EOL and the entire (supported) ecosystem
- * is on glibc 2.39.
- */
-
-#if HAVE_SECCOMP
-#  if defined(__alpha__)
-#    define NIX_SYSCALL_FCHMODAT2 562
-#  elif defined(__x86_64__) && SIZE_MAX == 0xFFFFFFFF // x32
-#    define NIX_SYSCALL_FCHMODAT2 1073742276
-#  elif defined(__mips__) && defined(__mips64) && defined(_ABIN64) // mips64/n64
-#    define NIX_SYSCALL_FCHMODAT2 5452
-#  elif defined(__mips__) && defined(__mips64) && defined(_ABIN32) // mips64/n32
-#    define NIX_SYSCALL_FCHMODAT2 6452
-#  elif defined(__mips__) && defined(_ABIO32) // mips32
-#    define NIX_SYSCALL_FCHMODAT2 4452
-#  else
-#    define NIX_SYSCALL_FCHMODAT2 452
-#  endif
-#endif // HAVE_SECCOMP
diff --git a/src/libstore/unix/build/local-derivation-goal.cc b/src/libstore/unix/build/local-derivation-goal.cc
index 72125cb82..078586528 100644
--- a/src/libstore/unix/build/local-derivation-goal.cc
+++ b/src/libstore/unix/build/local-derivation-goal.cc
@@ -37,7 +37,6 @@
 
 /* Includes required for chroot support. */
 #if __linux__
-# include "fchmodat2-compat.hh"
 # include <sys/ioctl.h>
 # include <net/if.h>
 # include <netinet/ip.h>
@@ -1673,10 +1672,6 @@ void setupSeccomp()
         if (seccomp_rule_add(ctx, SCMP_ACT_ERRNO(EPERM), SCMP_SYS(fchmodat), 1,
                 SCMP_A2(SCMP_CMP_MASKED_EQ, (scmp_datum_t) perm, (scmp_datum_t) perm)) != 0)
             throw SysError("unable to add seccomp rule");
-
-        if (seccomp_rule_add(ctx, SCMP_ACT_ERRNO(EPERM), NIX_SYSCALL_FCHMODAT2, 1,
-                SCMP_A2(SCMP_CMP_MASKED_EQ, (scmp_datum_t) perm, (scmp_datum_t) perm)) != 0)
-            throw SysError("unable to add seccomp rule");
     }
 
     /* Prevent builders from creating EAs or ACLs. Not all filesystems