diff --git a/gnu/packages/glib.scm b/gnu/packages/glib.scm
index 491f688c8e..cd9b48caff 100644
--- a/gnu/packages/glib.scm
+++ b/gnu/packages/glib.scm
@@ -36,7 +36,6 @@
   #:use-module (gnu packages enlightenment)
   #:use-module (gnu packages file)
   #:use-module (gnu packages flex)
-  #:use-module (gnu packages gcc)
   #:use-module (gnu packages gettext)
   #:use-module (gnu packages gnome)
   #:use-module (gnu packages gperf)
@@ -621,11 +620,7 @@ useful for C++.")
              (delete-file "tests/test_ossig.py")
              #t)))))
     (native-inputs
-     `(;; Use gcc-7 to work around an internal compiler error that happens
-       ;; when using gcc-5.5.0.  FIXME: Try removing this when the default
-       ;; compiler is no longer gcc-5.5.0.
-       ("gcc" ,gcc-7)
-       ("which" ,which)
+     `(("which" ,which)
        ;for tests: dbus-run-session and glib-compile-schemas
        ("dbus" ,dbus)
        ("glib-bin" ,glib "bin")
@@ -656,11 +651,7 @@ useful for C++.")
        ("python-pycairo" ,python2-pycairo)
        ("gobject-introspection" ,gobject-introspection)))
     (native-inputs
-     `(;; Use gcc-7 to work around an internal compiler error that happens
-       ;; when using gcc-5.5.0.  FIXME: Try removing this when the default
-       ;; compiler is no longer gcc-5.5.0.
-       ("gcc" ,gcc-7)
-       ("which" ,which)
+     `(("which" ,which)
        ;for tests: dbus-run-session and glib-compile-schemas
        ("dbus" ,dbus)
        ("glib-bin" ,glib "bin")
diff --git a/gnu/packages/gnome.scm b/gnu/packages/gnome.scm
index fe3c8b86ae..415398eeee 100644
--- a/gnu/packages/gnome.scm
+++ b/gnu/packages/gnome.scm
@@ -4633,14 +4633,6 @@ configuration program to choose applications starting on login.")
     (arguments
      '(#:phases
        (modify-phases %standard-phases
-         (add-after 'set-paths 'work-around-gcc-7-include-path-issue
-           ;; FIXME: Work around a problem with gcc-7 includes (see
-           ;; <https://bugs.gnu.org/30756>).  Note that we use gcc-7
-           ;; to work around an internal compiler error in gcc-5.
-           (lambda _
-             (unsetenv "C_INCLUDE_PATH")
-             (unsetenv "CPLUS_INCLUDE_PATH")
-             #t))
          (add-before
           'check 'pre-check
           (lambda _
@@ -4658,11 +4650,7 @@ configuration program to choose applications starting on login.")
               ((".*expect\\(datestr\\).*") ""))
             #t)))))
     (native-inputs
-     `(("gcc" ,gcc-7) ; FIXME: Work around an internal compiler error in
-                      ; gcc-5.  Try removing this when our default compiler is
-                      ; no longer gcc-5.5.0, and also remove the
-                      ; 'work-around-gcc-7-include-path-issue' phase above.
-       ("glib:bin" ,glib "bin")       ; for glib-compile-resources
+     `(("glib:bin" ,glib "bin")       ; for glib-compile-resources
        ("pkg-config" ,pkg-config)
        ("xmllint" ,libxml2)
        ;; For testing