diff --git a/.github/workflows/copilot-setup-steps.yml b/.github/workflows/copilot-setup-steps.yml
index 27eaa75..012f9f0 100644
--- a/.github/workflows/copilot-setup-steps.yml
+++ b/.github/workflows/copilot-setup-steps.yml
@@ -36,7 +36,10 @@ jobs:
       - name: Install dependencies
         uses: r-lib/actions/setup-r-dependencies@v2
         with:
+          # TEMPORARY: barry (>= 0.2.2) is not on CRAN yet; pull it from
+          # barryr's main branch. Remove once barry 0.2.2 is on CRAN.
           extra-packages: |
             any::rcmdcheck
             any::tinytest
+            USCbiostats/barryr
           needs: check
diff --git a/.github/workflows/coverage.yaml b/.github/workflows/coverage.yaml
index 8807b99..b993515 100644
--- a/.github/workflows/coverage.yaml
+++ b/.github/workflows/coverage.yaml
@@ -20,8 +20,11 @@ jobs:
 
       - uses: r-lib/actions/setup-r-dependencies@v2
         with:
+          # TEMPORARY: barry (>= 0.2.2) is not on CRAN yet; pull it from
+          # barryr's main branch. Remove once barry 0.2.2 is on CRAN.
           extra-packages: |
             any::covr
+            USCbiostats/barryr
           needs: check
 
       - name: Running coverage
diff --git a/.github/workflows/pkgdown.yaml b/.github/workflows/pkgdown.yaml
index 68c1a7b..50a5d65 100644
--- a/.github/workflows/pkgdown.yaml
+++ b/.github/workflows/pkgdown.yaml
@@ -41,9 +41,12 @@ jobs:
 
       - uses: r-lib/actions/setup-r-dependencies@v2
         with:
+          # TEMPORARY: barry (>= 0.2.2) is not on CRAN yet; pull it from
+          # barryr's main branch. Remove once barry 0.2.2 is on CRAN.
           extra-packages: |
             any::pkgdown
             local::.
+            USCbiostats/barryr
           needs: website
 
       - name: Build site
diff --git a/.github/workflows/r.yml b/.github/workflows/r.yml
index 1412d0d..d6af285 100644
--- a/.github/workflows/r.yml
+++ b/.github/workflows/r.yml
@@ -25,6 +25,13 @@ jobs:
           use-public-rspm: true
 
       - uses: r-lib/actions/setup-r-dependencies@v2
+        with:
+          # TEMPORARY: barry (>= 0.2.2) is not on CRAN yet; pull it from
+          # barryr's main branch. Remove once barry 0.2.2 is on CRAN.
+          # (The DESCRIPTION Remotes field is not honored by pak's
+          # `deps::.`, so the source must be listed here.)
+          extra-packages: |
+            USCbiostats/barryr
 
       - name: Build package
         run: R CMD build .
@@ -73,8 +80,11 @@ jobs:
 
       - uses: r-lib/actions/setup-r-dependencies@v2
         with:
+          # TEMPORARY: barry (>= 0.2.2) is not on CRAN yet; pull it from
+          # barryr's main branch. Remove once barry 0.2.2 is on CRAN.
           extra-packages: |
             any::rcmdcheck
+            USCbiostats/barryr
           needs: check
 
       - uses: r-lib/actions/check-r-package@v2
diff --git a/DESCRIPTION b/DESCRIPTION
index f2016f6..05a730c 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: defm
 Type: Package
 Title: Estimation and Simulation of Multi-Binary Response Models
-Version: 0.2.1.0
+Version: 0.2.2.0
 Authors@R: c(
     person("George", "Vega Yon", role=c("aut", "cre"),
     email="g.vegayon@gmail.com", comment = c(ORCID = "0000-0002-3171-0844")),
@@ -23,7 +23,7 @@ Encoding: UTF-8
 LazyData: true
 Roxygen: list(markdown = TRUE)
 RoxygenNote: 7.3.3
-LinkingTo: Rcpp, barry
+LinkingTo: Rcpp, barry (>= 0.2.2)
 Imports: 
     Rcpp,
     stats
@@ -32,3 +32,5 @@ Depends:
     stats4
 Suggests: 
     texreg, tinytest, barry
+Remotes:
+    USCbiostats/barryr
diff --git a/NEWS.md b/NEWS.md
index 910594c..a5f11d7 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,16 @@
+# defm 0.2.2.0
+
+* Requires `barry` (>= 0.2.2), which fixes a hash-collision bug that made
+  `init_defm()` appear to hang for models with many outcome columns
+  (USCbiostats/barry#24). A 16-outcome model that previously never finished
+  initializing now takes seconds.
+
+* Long-running computations (e.g., the support enumeration in `init_defm()`)
+  can now be interrupted from R with Ctrl-C. Note that a model interrupted
+  mid-initialization is left partially initialized and should be rebuilt
+  with `new_defm()` before further use.
+
+
 # defm 0.2.1.0
 
 * Returning to CRAN.
diff --git a/src/counters.cpp b/src/counters.cpp
index 194d796..92779d3 100644
--- a/src/counters.cpp
+++ b/src/counters.cpp
@@ -1,4 +1,9 @@
 #include <Rcpp.h>
+
+// Lets barry check for user interrupts (Ctrl-C) during long-running
+// computations such as the support enumeration in init_defm().
+#define BARRY_USER_INTERRUPT Rcpp::checkUserInterrupt();
+
 #include <barry/barry.hpp>
 #include <barry/models/defm.hpp>
 
diff --git a/src/defm-object.cpp b/src/defm-object.cpp
index f1075ad..4a35956 100644
--- a/src/defm-object.cpp
+++ b/src/defm-object.cpp
@@ -1,4 +1,9 @@
 #include <Rcpp.h>
+
+// Lets barry check for user interrupts (Ctrl-C) during long-running
+// computations such as the support enumeration in init_defm().
+#define BARRY_USER_INTERRUPT Rcpp::checkUserInterrupt();
+
 #include <barry/barry.hpp>
 #include <barry/models/defm.hpp>
 
diff --git a/src/terms.cpp b/src/terms.cpp
index 73b8452..4d5aa22 100644
--- a/src/terms.cpp
+++ b/src/terms.cpp
@@ -1,4 +1,9 @@
 #include <Rcpp.h>
+
+// Lets barry check for user interrupts (Ctrl-C) during long-running
+// computations such as the support enumeration in init_defm().
+#define BARRY_USER_INTERRUPT Rcpp::checkUserInterrupt();
+
 #include "barry/barry.hpp"
 #include "barry/models/defm.hpp"
 #include "defm-common.h"