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authorEelco Dolstra <edolstra@gmail.com>2020-02-15 20:14:46 +0100
committerEelco Dolstra <edolstra@gmail.com>2020-02-15 20:16:14 +0100
commita5f883e5359ca97fb946dade25418d5732e3cdf7 (patch)
treeae6fc85675dbc4d794d902ba63de657442bac090 /nixos
parentbfb7ebf5dfded338aef31fa9640c5ebc1050932e (diff)
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nixos/modules/installer/cd-dvd/channel.nix: Handle null config.system.nixos.revision
Diffstat (limited to 'nixos')
-rw-r--r--nixos/modules/installer/cd-dvd/channel.nix4
1 files changed, 3 insertions, 1 deletions
diff --git a/nixos/modules/installer/cd-dvd/channel.nix b/nixos/modules/installer/cd-dvd/channel.nix
index ab5e7c0645f..92164d65e53 100644
--- a/nixos/modules/installer/cd-dvd/channel.nix
+++ b/nixos/modules/installer/cd-dvd/channel.nix
@@ -21,7 +21,9 @@ let
       if [ ! -e $out/nixos/nixpkgs ]; then
         ln -s . $out/nixos/nixpkgs
       fi
-      echo -n ${config.system.nixos.revision} > $out/nixos/.git-revision
+      ${optionalString (config.system.nixos.revision != null) ''
+        echo -n ${config.system.nixos.revision} > $out/nixos/.git-revision
+      ''}
       echo -n ${config.system.nixos.versionSuffix} > $out/nixos/.version-suffix
       echo ${config.system.nixos.versionSuffix} | sed -e s/pre// > $out/nixos/svn-revision
     '';