found valid signature for '/gnu/store/18mjcffcvvkq0n62aw91k8ivc2lyy3yl-pflask-0.2', from 'http://localhost:8080/nar/18mjcffcvvkq0n62aw91k8ivc2lyy3yl-pflask-0.2'
sha256:h2f3y3w47koaao34cs2pombwikhphztp5oq7hn57n4m6xaseolda
downloading `/gnu/store/18mjcffcvvkq0n62aw91k8ivc2lyy3yl-pflask-0.2' (0.1 MiB installed)...
http://localhost/.../18mjcffcvvkq0n62aw91k8ivc2lyy3yl-pflask-0.2	 44.8% of 53.6 KiB (23.58 MiB/s)Backtrace:
In ice-9/boot-9.scm:
 157: 14 [catch #t #<catch-closure 20289a0> ...]
In unknown file:
   ?: 13 [apply-smob/1 #<catch-closure 20289a0>]
In ice-9/boot-9.scm:
  63: 12 [call-with-prompt prompt0 ...]
In ice-9/eval.scm:
 432: 11 [eval # #]
In ice-9/boot-9.scm:
2401: 10 [save-module-excursion #<procedure 2046940 at ice-9/boot-9.scm:4045:3 ()>]
4050: 9 [#<procedure 2046940 at ice-9/boot-9.scm:4045:3 ()>]
1724: 8 [%start-stack load-stack ...]
1729: 7 [#<procedure 205cea0 ()>]
In unknown file:
   ?: 6 [primitive-load "/home/dave/Code/guix/scripts/guix"]
In guix/ui.scm:
 849: 5 [run-guix-command substitute-binary "--substitute" ...]
In ice-9/boot-9.scm:
 157: 4 [catch getaddrinfo-error ...]
In guix/scripts/substitute-binary.scm:
 766: 3 [#<procedure 2a04b00 at guix/scripts/substitute-binary.scm:677:2 ()>]
In guix/serialization.scm:
 331: 2 [restore-file #<input: r6rs-custom-binary-input-port 2a34820> "/tmp/foobar"]
 365: 1 [restore "/tmp/foobar"]
 365: 0 [restore "/tmp/foobar/bin"]

guix/serialization.scm:365:19: In procedure restore:
guix/serialization.scm:365:19: Throw to key `srfi-34' with args `(#<condition %compound [message: "invalid nar end-of-file marker" file: "/tmp/foobar/bin/pflask" port: #<input: r6rs-custom-binary-input-port 2a34820> token: "F \x00H??????H??????H?\x05?F \x00H??????H?\x05?F \x00H??????H?\x05?F \x00H??????H?\x05?F \x00H??????H?\x05?F \x00H??????H?\x05?F \x00H???????\x05?F \x00???????????H???????\x02\x00\x00\x00?\x19???H???????\x0f\x00\x00\x00?\b???H???????\x11\x00\x00\x00?????H???????\x1c\x00\x00\x00?????H??????1?1????????\x0f??\x03\x00\x00H???????\x00\b\b\x00??????H?????A??\x0f??\x03\x00\x001??\x00?`\x00???????\x0f??\x03\x00\x00H???????\x1d???H??????1?1?????????v?????\x0f??\x03\x00\x00?\x00\x00\b\x00?T?????A??\x0f??\x03\x00\x00H??0???1Ҿ\x01\x00\x00\x00D??Dž0???\x01\x00\x00\x00Dž4???\x00\x00\x00\x00???????\x0f??\x03\x00\x00H??@???D???\x01\x00\x00\x00D??Dž@???\x01\x00\x00\x00D??D??????????\x0f?\x0f\x03\x00\x00H??P???D???\x01\x00\x00\x00D??DžP???\x01\x00\x00\x00D??T??????????\x0f??\x02\x00\x00Hc?H??\x10???H??\x0fH??\x18???H??\x18????I??H+?\x18???H??`?????????\x01\x00\x00\x00D???G?????H??\x0f??\x01\x00\x00??d?????t\x1aA9?\x0f??\x00\x00\x00A9?\x0f??\x00\x00\x00L????\x0f\x1f\x00H??\x10???1?H???7?????\x0f?G\x01\x00\x00Hc?H??D?????????H??\x0f??\x01\x00\x00Hc?H\x01?H9?s%?;\x00\x0f?\x1a\x01\x00\x00H???\x0e\x0f\x1fD\x00\x00?8\x00\x0f?\a\x01\x00\x00H??\x01H9?u\ue2c5d???A9?\x0f?~???\x0f\x1f?\x00\x00\x00\x00H??\x10???H??D?????????\x0f??\x00\x00\x00Hc?H?\u07bf\x01\x00\x00\x00?&?????\x0f?Y\x02\x00\x00??d???A9?\x0f?????\x0f\x1f?\x00\x00\x00\x00H??P?????\x00\x00\x00D???t??????t\f??h@\x001???\"\x00\x00??P?????\x0ftpv^??\x11ti??\x1c\x0f?????H?? ???1?1??\x13T\x00\x00???????\x0f??\x01\x00\x00H?? ???1??\x14T\x00\x00D?????????\x0f???????h@\x001??a\"\x00\x00?????\x0f\x1f@\x00??\x02\x0f?????\x0f\x1f?\x00\x00\x00\x001?1?L???\x00?`\x00???????x[A???t\x10D?????????\x0f?g\x01\x00\x00A???t\x10D???o?????\x0f?@\x01\x00\x00H?e?[A\\A]A^A_]?\x0f\x1f?\x00\x00\x00\x00\x00??h@\x001???!\x00\x00?\x13???\x0f\x1f?\x00\x00\x00\x00?\vh@\x001???!\x00\x00??f.\x0f\x1f?\x00\x00\x00\x00\x00H??\b?????h@\x001???!\x00\x00H??\b????+?????(h@"] 2a3e400>)'.