Nix #219 (29 Mar)
By Eelco Dolstra
"cannot set up a private mount namespace"
Seen once on x86_64-linux when running nix-build:
build error: cannot set up a private mount namespace: File exists
The error went away when I re-ran the same command.
The message comes from libstore/build.cc:
if (unshare(CLONE_NEWNS) == -1)
throw SysError(format("cannot set up a private mount namespace"));
The manpage for unshare() doesn't list EEXIST as a possible error, so I have no idea what could cause this.
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