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-rw-r--r--guix/derivations.scm4
1 files changed, 2 insertions, 2 deletions
diff --git a/guix/derivations.scm b/guix/derivations.scm
index 07803ca94f..b95849727b 100644
--- a/guix/derivations.scm
+++ b/guix/derivations.scm
@@ -136,7 +136,7 @@
(env-vars derivation-builder-environment-vars) ; list of name/value pairs
(file-name derivation-file-name)) ; the .drv file name
-(define-record-type <derivation-output>
+(define-immutable-record-type <derivation-output>
(make-derivation-output path hash-algo hash recursive?)
derivation-output?
(path derivation-output-path) ; store path
@@ -144,7 +144,7 @@
(hash derivation-output-hash) ; bytevector | #f
(recursive? derivation-output-recursive?)) ; Boolean
-(define-record-type <derivation-input>
+(define-immutable-record-type <derivation-input>
(make-derivation-input path sub-derivations)
derivation-input?
(path derivation-input-path) ; store path