https://github.com/Millak/guix/commit/06f79dc2bd44ca292dade633d344c3f70749b9e7

--- plug-ins/file-tiff/file-tiff-load.c
+++ plug-ins/file-tiff/file-tiff-load.c
@@ -1297,8 +1297,8 @@ load_image (GFile        *file,
 
       /* any resolution info in the file? */
       {
-        gfloat   xres = 72.0;
-        gfloat   yres = 72.0;
+        gdouble   xres = 72.0;
+        gdouble   yres = 72.0;
         gushort  read_unit;
         GimpUnit unit = GIMP_UNIT_PIXEL; /* invalid unit */
 

--- plug-ins/metadata/metadata-editor.c
+++ plug-ins/metadata/metadata-editor.c
@@ -2846,7 +2846,7 @@ metadata_dialog_editor_set_metadata (GExiv2Metadata  *metadata,
                             }
                           else
                             {
-                              if (! g_strv_contains (values, equiv_values[evi]))
+                              if (! g_strv_contains ((const gchar * const *) values, equiv_values[evi]))
                                 {
                                   gchar *tmpvalue;