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diff -Naur nix-2.3.10.orig/src/libstore/build.cc nix-2.3.10/src/libstore/build.cc
--- nix-2.3.10.orig/src/libstore/build.cc 1970-01-01 08:00:01.000000000 +0800
+++ nix-2.3.10/src/libstore/build.cc 2021-04-24 16:17:08.778875340 +0800
@@ -840,9 +840,16 @@
/* Whether this is a fixed-output derivation. */
bool fixedOutput;
+ bool networked;
+
/* Whether to run the build in a private network namespace. */
bool privateNetwork = false;
+ bool allowNetwork()
+ {
+ return fixedOutput || networked;
+ }
+
typedef void (DerivationGoal::*GoalState)();
GoalState state;
@@ -1181,6 +1188,8 @@
{
trace("have derivation");
+ fixedOutput = drv->isFixedOutput();
+
retrySubstitution = false;
for (auto & i : drv->outputs)
@@ -1197,6 +1206,8 @@
parsedDrv = std::make_unique<ParsedDerivation>(drvPath, *drv);
+ networked = parsedDrv->getBoolAttr("__networked");
+
/* We are first going to try to create the invalid output paths
through substitutes. If that doesn't work, we'll build
them. */
@@ -1932,7 +1943,7 @@
else if (settings.sandboxMode == smDisabled)
useChroot = false;
else if (settings.sandboxMode == smRelaxed)
- useChroot = !fixedOutput && !noChroot;
+ useChroot = !allowNetwork() && !noChroot;
}
if (worker.store.storeDir != worker.store.realStoreDir) {
@@ -2109,7 +2120,7 @@
"nogroup:x:65534:\n") % sandboxGid).str());
/* Create /etc/hosts with localhost entry. */
- if (!fixedOutput)
+ if (!allowNetwork())
writeFile(chrootRootDir + "/etc/hosts", "127.0.0.1 localhost\n::1 localhost\n");
/* Make the closure of the inputs available in the chroot,
@@ -2323,7 +2334,7 @@
us.
*/
- if (!fixedOutput)
+ if (!allowNetwork())
privateNetwork = true;
userNamespaceSync.create();
@@ -2534,7 +2545,7 @@
to the builder is generally impure, but the output of
fixed-output derivations is by definition pure (since we
already know the cryptographic hash of the output). */
- if (fixedOutput) {
+ if (allowNetwork()) {
for (auto & i : parsedDrv->getStringsAttr("impureEnvVars").value_or(Strings()))
env[i] = getEnv(i);
}
@@ -2823,7 +2834,7 @@
/* Fixed-output derivations typically need to access the
network, so give them access to /etc/resolv.conf and so
on. */
- if (fixedOutput) {
+ if (allowNetwork()) {
ss.push_back("/etc/resolv.conf");
// Only use nss functions to resolve hosts and