The reproduce script would fail for me, because it passed revCount as a string to nix-build, which would then fail to subtract from it.
D5PPPDYF4EMDQWHRUDC2TEM5LFMMR4GM3D55AY5QLRDJN6MLXOAQC
args+=(--arg '[% input.name %]' "{ outPath = $inputDir; rev = \"[% input.revision %]\"; shortRev = \"[% input.revision.substr(0, 7) %]\"; revCount = \"$revCount\"; }")
args+=(--arg '[% input.name %]' "{ outPath = $inputDir; rev = \"[% input.revision %]\"; shortRev = \"[% input.revision.substr(0, 7) %]\"; revCount = $revCount; }")