+# Commit corresponding to the 'v1.0.0' tag.
+commit_v1_0_0 = 6298c3ffd9654d3231a6f25390b056483e8f407c
+
+# Introduction of the 'guix' channel. Keep in sync with (guix channels)!
+channel_intro_commit = 9edb3f66fd807b096b48283debdcddccfea34bad
+channel_intro_signer = BBB0 2DDF 2CEA F6A8 0D1D E643 A2A0 6DF2 A33A 54FA
+
+# Authenticate the current Git checkout by checking signatures on every commit.
+authenticate:
+ $(AM_V_at)echo "Authenticating Git checkout..." ; \
+ guix git authenticate \
+ --cache-key=channels/guix --stats \
+ "$(channel_intro_commit)" "$(channel_intro_signer)"
+