Latest git pull - conkeror broken

[白い熊＠相撲道]

Since yesterday I can't run conkeror, without any changes in conkeror's 
config, just guix git pull, make and package -u

The log:

address@hidden ~$ conkeror

(process:4960): GLib-CRITICAL **: g_slice_set_config: assertion 
'sys_page_size == 0' failed

(conkeror:4960): Gtk-WARNING **: Locale not supported by C library.
        Using the fallback 'C' locale.
JavaScript strict warning: resource://gre/modules/GMPUtils.jsm, line 92: 
ReferenceError: reference to undefined property this.KEY_LOG_BASE
JavaScript strict warning: chrome://conkeror/content/keywords.js, line 
20: SyntaxError: in strict mode code, functions may be declared only at 
top level or immediately within another function
JavaScript strict warning: chrome://conkeror/content/keywords.js, line 
30: SyntaxError: in strict mode code, functions may be declared only at 
top level or immediately within another function
JavaScript strict warning: chrome://conkeror/content/keywords.js, line 
62: SyntaxError: in strict mode code, functions may be declared only at 
top level or immediately within another function
JavaScript strict warning: chrome://conkeror/content/keywords.js, line 
68: SyntaxError: in strict mode code, functions may be declared only at 
top level or immediately within another function
JavaScript strict warning: chrome://conkeror/content/keywords.js, line 
72: SyntaxError: in strict mode code, functions may be declared only at 
top level or immediately within another function
JavaScript warning: chrome://conkeror/content/coroutine.js, line 354: 
mutating the [[Prototype]] of an object will cause your code to run very 
slowly; instead create the object with the correct initial [[Prototype]] 
value using Object.create
JavaScript warning: chrome://conkeror/content/debug.js, line 87: 
JavaScript 1.7's let blocks are deprecated
JavaScript strict warning: chrome://conkeror/content/env.js, line 16: 
SyntaxError: in strict mode code, functions may be declared only at top 
level or immediately within another function
JavaScript warning: chrome://conkeror/content/env.js, line 15: 
JavaScript 1.7's let blocks are deprecated
JavaScript strict warning: chrome://conkeror/content/env.js, line 42: 
SyntaxError: in strict mode code, functions may be declared only at top 
level or immediately within another function
JavaScript warning: chrome://conkeror/content/env.js, line 41: 
JavaScript 1.7's let blocks are deprecated
JavaScript strict warning: chrome://conkeror/content/env.js, line 79: 
SyntaxError: in strict mode code, functions may be declared only at top 
level or immediately within another function
JavaScript warning: chrome://conkeror/content/env.js, line 78: 
JavaScript 1.7's let blocks are deprecated
JavaScript strict warning: chrome://conkeror/content/utils.js, line 207: 
SyntaxError: octal literals and octal escape sequences are deprecated
JavaScript strict warning: chrome://conkeror/content/utils.js, line 207: 
SyntaxError: octal literals and octal escape sequences are deprecated
JavaScript strict warning: chrome://conkeror/content/utils.js, line 207: 
SyntaxError: octal literals and octal escape sequences are deprecated
JavaScript strict warning: 
file:///gnu/store/s507v0spxkh38x2i7bmfpkflkib62mqd-conkeror-1.0pre1/share/conkeror/components/application.js, 
line 167: ReferenceError: reference to undefined property (intermediate 
value)[e]
Error initializing.
Error: Error opening input stream (invalid filename?): 
chrome://conkeror/content/io
JavaScript error: 
file:///gnu/store/s507v0spxkh38x2i7bmfpkflkib62mqd-conkeror-1.0pre1/share/conkeror/components/command-line.js, 
line 23: TypeError: conkeror.handle_command_line is not a function
Console error: [JavaScript Warning: "SyntaxError: in strict mode code, 
functions may be declared only at top level or immediately within 
another function" {file: "chrome://conkeror/content/env.js" line: 16 
column: 13 source: "    function get_os () {
"}]
  Category: chrome javascript
Console error: [JavaScript Warning: "JavaScript 1.7's let blocks are 
deprecated" {file: "chrome://conkeror/content/env.js" line: 15}]
  Category: chrome javascript
Console error: [JavaScript Warning: "SyntaxError: in strict mode code, 
functions may be declared only at top level or immediately within 
another function" {file: "chrome://conkeror/content/env.js" line: 42 
column: 13 source: "    function getenv (variable) {
"}]
  Category: chrome javascript
Console error: [JavaScript Warning: "JavaScript 1.7's let blocks are 
deprecated" {file: "chrome://conkeror/content/env.js" line: 41}]
  Category: chrome javascript
Console error: [JavaScript Warning: "SyntaxError: in strict mode code, 
functions may be declared only at top level or immediately within 
another function" {file: "chrome://conkeror/content/env.js" line: 79 
column: 13 source: "    function get_current_profile () {
"}]
  Category: chrome javascript
Console error: [JavaScript Warning: "JavaScript 1.7's let blocks are 
deprecated" {file: "chrome://conkeror/content/env.js" line: 78}]
  Category: chrome javascript
Console error: [JavaScript Warning: "SyntaxError: octal literals and 
octal escape sequences are deprecated" {file: 
"chrome://conkeror/content/utils.js" line: 207 column: 51 source: "    
file.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, 0600);
"}]
  Category: chrome javascript
Console error: [JavaScript Warning: "SyntaxError: octal literals and 
octal escape sequences are deprecated" {file: 
"chrome://conkeror/content/utils.js" line: 207 column: 51 source: "    
file.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, 0600);
"}]
  Category: chrome javascript
Console error: [JavaScript Warning: "SyntaxError: octal literals and 
octal escape sequences are deprecated" {file: 
"chrome://conkeror/content/utils.js" line: 207 column: 51 source: "    
file.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, 0600);
"}]
  Category: chrome javascript
Console error: [JavaScript Warning: "ReferenceError: reference to 
undefined property (intermediate value)[e]" {file: 
"file:///gnu/store/s507v0spxkh38x2i7bmfpkflkib62mqd-conkeror-1.0pre1/share/conkeror/components/application.js" 
line: 167}]
  Category: chrome javascript
Console error: [JavaScript Error: "TypeError: 
conkeror.handle_command_line is not a function" {file: 
"file:///gnu/store/s507v0spxkh38x2i7bmfpkflkib62mqd-conkeror-1.0pre1/share/conkeror/components/command-line.js" 
line: 23}]
  Category: chrome javascript

Anyone have an idea what's going on?

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白い熊＠相撲道