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with import ./config.nix;
# A simple content-addressed derivation.
# The derivation can be arbitrarily modified by passing a different `seed`,
# but the output will always be the same
rec {
hello = mkDerivation {
name = "hello";
buildCommand = ''
set -x
echo "Building a CA derivation"
mkdir -p $out
echo "Hello World" > $out/hello
'';
};
producingDrv = mkDerivation {
name = "hello.drv";
buildCommand = ''
echo "Copying the derivation"
cp ${builtins.unsafeDiscardOutputDependency hello.drvPath} $out
'';
__contentAddressed = true;
outputHashMode = "text";
outputHashAlgo = "sha256";
};
wrapper = mkDerivation {
name = "use-dynamic-drv-in-non-dynamic-drv";
buildCommand = ''
echo "Copying the output of the dynamic derivation"
cp -r ${builtins.outputOf producingDrv.outPath "out"} $out
'';
};
}
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