I started with a guix checkout at commit 
d519305d83d08058e4def2c4d72fe62102d9599d. Everything was compiled, 
according to "make".

Then I switched to current master: b21d05d232ec0aba5abec20e83cc52c1d5163cc3.

Now I get the following error:

> In language/tree-il/peval.scm:
>     799:6 19 (loop _ #<vhash 7f81d96446e0 10 pairs> #f effect)
>   1661:48 18 (loop _ _ _ effect)
> In srfi/srfi-1.scm:
>    586:17 17 (map1 (#<tree-il (lexical install #{ g377}#)> #<tree-il 
> (const documentation)> #<tree-il (const "Standard 'install' phase for 
> clojure-build-system.")>))
> In language/tree-il/peval.scm:
>    853:11 16 (loop _ _ #f value)
>    346:22 15 (visit-operand #<<operand> var: #<<var> name: install 
> gensym: #{ g377}# refcount: 2 set?: #f> sym: #{install 412}# visit: 
> #<procedure 7f81d96447a0 at language/tree-il/peval.scm:977:40 (exp 
> counter ctx)> source: #<tree-il (primcall values (call (@ (guix build 
> java-utils) install-jars) (const "./")))> visit-count: 1 use-count: 0 
> copyable?: #t residual-value: #f constant-value: #f alias: #f> _ value 
> _ _)
>   1286:21 14 (loop _ #<vhash 7f81d96242c0 8 pairs> #<<counter> effort: 
> #<variable 7f81d9876ae0 value: 0> size: #<variable 7f81d9876ad0 value: 
> 0> continuation: #<procedure abort ()> recursive?: #t data: 
> #<<operand> var: #<<var> name: install gensym: #{ g377}# refcount: 2 
> set?: #f> sym: #{install 412}# visit: #<procedure 7f81d96447a0 at 
> language/tree-il/peval.scm:977:40 (exp counter ctx)> source: #<tree-il 
> (primcall values (call (@ (guix build java-utils) install-…> …)
> In srfi/srfi-1.scm:
>    586:17 13 (map1 (#<tree-il (call (@ (guix build java-utils) 
> install-jars) (const "./"))>))
> In language/tree-il/peval.scm:
>   1625:20 12 (loop _ #<vhash 7f81d96242c0 8 pairs> #<<counter> effort: 
> #<variable 7f81d9876ae0 value: 0> size: #<variable 7f81d9876ad0 value: 
> 0> continuation: #<procedure abort ()> recursive?: #t data: 
> #<<operand> var: #<<var> name: install gensym: #{ g377}# refcount: 2 
> set?: #f> sym: #{install 412}# visit: #<procedure 7f81d96447a0 at 
> language/tree-il/peval.scm:977:40 (exp counter ctx)> source: #<tree-il 
> (primcall values (call (@ (guix build java-utils) install-…> …)
>    981:20 11 (loop _ #<vhash 7f81d96242c0 8 pairs> #<<counter> effort: 
> #<variable 7f81d9876710 value: 65> size: #<variable 7f81d9876700 
> value: 20> continuation: #<procedure abort ()> recursive?: #f data: 
> #<tree-il (lambda ((name . install-jars)) (lambda-case 
> (((jar-directory) #f #f #f () (t413)) (lambda () (lambda-case ((() #f 
> #f (#t (#:outputs outputs #f)) ((const #f)) (t414)) (let (share) 
> (t415) ((call (@ (guile) string-append) (call (@ (guile) assoc-ref) 
> (lex…> …)
>     799:6 10 (loop #<tree-il (lambda () (lambda-case ((() #f #f (#t 
> (#:outputs outputs #f)) ((const #f)) (t414)) (let (share) (t415) 
> ((call (@ (guile) string-append) (call (@ (guile) assoc-ref) (lexical 
> outputs t414) (const "out")) (const "/share/java"))) (seq (call (@ 
> (guile) for-each) (lambda () (lambda-case (((f) #f #f #f () (t416)) 
> (call (@ (guix build utils) install-file) (lexical f t416) (lexical 
> share t415))))) (call (@ (guix build utils) find-files) (lex…> …)
>   1699:60  9 (loop _ #<vhash 7f81d964b200 10 pairs> #<<counter> 
> effort: #<variable 7f81d9876710 value: 65> size: #<variable 
> 7f81d9876700 value: 20> continuation: #<procedure abort ()> 
> recursive?: #f data: #<tree-il (lambda ((name . install-jars)) 
> (lambda-case (((jar-directory) #f #f #f () (t413)) (lambda () 
> (lambda-case ((() #f #f (#t (#:outputs outputs #f)) ((const #f)) 
> (t414)) (let (share) (t415) ((call (@ (guile) string-append) (call (@ 
> (guile) assoc-ref) (le…> …)
> In srfi/srfi-1.scm:
>    586:17  8 (map1 (#f))
> In language/tree-il/peval.scm:
>   1691:38  7 (new-sym _)
> In ice-9/boot-9.scm:
>   1685:16  6 (raise-exception _ #:continuable? _)
>   1685:16  5 (raise-exception _ #:continuable? _)
>   1780:13  4 (_ #<&compound-exception components: 
> (#<&assertion-failure> #<&origin origin: "cdr"> #<&message message: 
> "Wrong type argument in position 1 (expecting pair): ~S"> #<&irritants 
> irritants: (#f)> #<&exception-with-kind-and-args kind: wrong-type-arg 
> args: ("cdr" "Wrong type argument in position 1 (expecting pair): ~S" 
> (#f) (#f))>)>)
> In guix/build/compile.scm:
>     191:6  3 (_ _ . _)
> In ice-9/boot-9.scm:
>   1747:15  2 (with-exception-handler #<procedure 7f81dac67270 at 
> ice-9/boot-9.scm:1831:7 (exn)> _ #:unwind? _ #:unwind-for-type _)
> In guix/build/compile.scm:
>    194:22  1 (_)
> In unknown file:
>            0 (make-stack #t)
Looking at language/tree-il/peval.scm 1691:38, it appears that somehow 
the 'old' symbol does not appear in the environment.

For a minimal test case, remove everything but the 'define-module' and 
the '(define-with-docs install [...])'.

Looks like something is going wrong with 'define-with-docs' (without 
-with-docs and without the docstring, it compiles fine).

Greetings,
Maxime.