gnu: go-github-com-djherbis-nio: Rename variable.

* gnu/packages/golang-xyz.scm (go-github-com-djherbis-nio): Rename to
go-github-com-djherbis-nio-v3 and deprecate go-github-com-djherbis-nio.
* gnu/packages/engineering.scm (arduino-cli): Replace
go-github-com-djherbis-nio with go-github-com-djherbis-nio-v3.

2 files changed, 7 insertions, 3 deletions

diff --git a/gnu/packages/engineering.scm b/gnu/packages/engineering.scm
index 4e77206b4c3..b34cdc44544 100644
--- a/gnu/packages/engineering.scm
+++ b/gnu/packages/engineering.scm
@@ -1945,7 +1945,7 @@ language, ADMS transforms Verilog-AMS code into other target languages.")
             go-github-com-cmaglie-pb
             go-github-com-codeclysm-extract
             go-github-com-djherbis-buffer
-            go-github-com-djherbis-nio
+            go-github-com-djherbis-nio-v3
             go-github-com-fatih-color
             go-github-com-go-git-go-git-v5
             go-github-com-gofrs-uuid-v5
diff --git a/gnu/packages/golang-xyz.scm b/gnu/packages/golang-xyz.scm
index 533dd8efe72..2bec18f5a56 100644
--- a/gnu/packages/golang-xyz.scm
+++ b/gnu/packages/golang-xyz.scm
@@ -9668,9 +9668,9 @@ it reaches its capacity.
 @end itemize")
     (license license:expat)))
 
-(define-public go-github-com-djherbis-nio
+(define-public go-github-com-djherbis-nio-v3
   (package
-    (name "go-github-com-djherbis-nio")
+    (name "go-github-com-djherbis-nio-v3")
     (version "3.0.1")
     (source
      (origin
@@ -9692,6 +9692,10 @@ it reaches its capacity.
     (description "Package @code{nio} provides a few buffered I/O primitives.")
     (license license:expat)))
 
+;; XXX: Deprecated on <2026-07-09>.
+(define-deprecated-package go-github-com-djherbis-nio
+  go-github-com-djherbis-nio-v3)
+
 (define-public go-github-com-djherbis-times
   (package
     (name "go-github-com-djherbis-times")