Hi

Thank you for the patch.

I've adjusted it to build library and executable in 2 separate packages.

--8<---------------cut here---------------start------------->8---
modified   gnu/packages/golang-crypto.scm
@@ -1275,15 +1275,15 @@ (define-public go-github-com-jphastings-jwker
     (build-system go-build-system)
     (arguments
      (list
-      #:import-path "github.com/jphastings/jwker/cmd/jwker"
-      #:unpack-path "github.com/jphastings/jwker"))
-    (propagated-inputs (list go-github-com-stretchr-testify))
+      #:import-path "github.com/jphastings/jwker"))
+    (native-inputs
+     (list go-github-com-stretchr-testify))
     (home-page "https://github.com/jphastings/jwker")
-    (synopsis "Command line tool to easily convert keys between the PEM and
-JWK file formats")
-    (description "This package provides a command line tool to convert keys
-between the @acronym{PEM, Privacy-Enhanced Mail} and @acronym{JWK, JSON Web
-Key}file formats.")
+    (synopsis "PEM -> JWK conversion tool")
+    (description
+     "This package implements a functionality to convert keys between the
+@acronym{PEM, Privacy-Enhanced Mail} and @acronym{JWK, JSON Web Key} file
+formats.")
     (license license:expat)))
 
 (define-public go-github-com-jzelinskie-whirlpool
@@ -2592,6 +2592,19 @@ (define-public age-keygen
        #:unpack-path "filippo.io/age"
        #:install-source? #f))))
 
+(define-public go-jwker
+  (package/inherit go-github-com-jphastings-jwker
+    (name "go-jwker")
+    (arguments
+     (list
+      #:tests? #f
+      #:install-source? #f
+      #:build-flags
+      #~(list (string-append "-ldflags=-X main.version="
+                             #$(package-version this-package)))
+      #:unpack-path "github.com/jphastings/jwker"
+      #:import-path "github.com/jphastings/jwker/cmd/jwker"))))
+
 (define-public go-keyring
   (package
     (inherit go-github-com-99designs-keyring)
--8<---------------cut here---------------end--------------->8---

Pushed to master as 5c9572a5e60d7e91ba5b182b1a80fc9ce42846a7.

--
Oleg