diff --git a/projects/gnu.org/gcc/package.yml b/projects/gnu.org/gcc/package.yml
index 5600b1b7d8..7ba671bfb4 100644
--- a/projects/gnu.org/gcc/package.yml
+++ b/projects/gnu.org/gcc/package.yml
@@ -26,6 +26,11 @@ dependencies:
   gnu.org/mpfr: ">=2.4.0"
   gnu.org/mpc: ">=0.8.0"
   zlib.net: ^1.3
+  linux:
+    gnu.org/glibc: "*"            # libc headers (stdlib.h, stdio.h, ...) +
+                                  # crt*.o + libc.so.6 for from-source C/C++
+                                  # builds in pkgx-isolated environments
+    kernel.org/linux-headers: "*" # Linux syscall headers for libc consumers
   darwin/x86-64: # since 15.1.0
     libisl.sourceforge.io: ^0